PCB feeding and discharging clamp of tin spraying machine

Abstract

The utility model discloses a PCB feeding and discharging clamp of a tin spraying machine. The PCB feeding and discharging clamp comprises a rack, a motor, a transmission assembly, a clamping moving track, a first sliding arm, a second sliding arm and a clamping piece. The rack comprises a middle mounting plate, a left mounting frame and a right mounting frame, the left mounting frame and the right mounting frame are arranged on the two sides of the middle mounting plate correspondingly, and the number of the clamping moving rails is two; the transmission assembly comprises a conveying belt, a driven wheel, a first belt sliding block and a second belt sliding block, the conveying belt is arranged around the output end of the motor and the driven wheel, the first belt sliding block is arranged on the lower portion of the conveying belt, and the second belt sliding block is arranged on the upper portion of the conveying belt; the first sliding arm comprises a first rail sliding block, and the second sliding arm comprises a second rail sliding block. The two sets of clamping pieces are arranged on the lower portion of the first sliding arm and the lower portion of the second sliding arm respectively. According to the technical scheme, automatic feeding and discharging operation of the PCBs can be achieved, and therefore the machining efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of material clamps, in particular to a material loading and unloading clamp for a PCB board of a tin spraying machine. Background Art

[0002] The tin spraying of PCB is a step and process flow in the production process of PCB. When the tin spraying process is performed, the PCB needs to be immersed in a molten solder pool so that the solder covers the exposed copper surface of the PCB, and then the excess solder is removed by a hot air cutter to complete the tin spraying process. However, in the prior art, when the PCB is tin sprayed, the loading and unloading operations of the PCB are generally performed manually, so there is a problem of low processing efficiency.

[0003] To this end, we propose a PCB loading and unloading fixture for a tin-spraying machine that can improve processing efficiency. Utility Model Content

[0004] The main purpose of the utility model is to provide a PCB board loading and unloading fixture for a tin spraying machine, aiming to solve the technical problem of low processing efficiency in the existing PCB board tin spraying processing.

[0005] To achieve the above-mentioned purpose, the utility model proposes a PCB board loading and unloading fixture for a tin spraying machine, comprising a frame, a motor, a transmission assembly, a clamping moving track, a first sliding arm and a second sliding arm;

[0006] The frame includes a middle mounting plate, a left mounting frame and a right mounting frame, the left mounting frame and the right mounting frame are respectively arranged on both sides of the middle mounting plate, the number of the clamping movable rails is two, the two clamping movable rails are both arranged on the rear side of the middle mounting plate, and the two clamping movable rails are both arranged along the length direction of the middle mounting plate;

[0007] The transmission assembly includes a conveyor belt, a driven wheel, a first belt slider and a second belt slider, the driven wheel is fixedly installed between the middle mounting plate and the left mounting frame, and the two ends of the driven wheel are respectively fixedly connected to the left mounting frame and the middle mounting plate, the middle mounting plate includes a right mounting hole, the output end of the motor passes through the right mounting hole and is rotatably connected to the right mounting frame, the conveyor belt is arranged around the output end of the motor and the driven wheel, and the conveyor belt is located between two clamping movable rails, the first belt slider is arranged at the lower part of the conveyor belt, and the second belt slider is arranged at the upper part of the conveyor belt;

[0008] The first sliding arm comprises a first track slider, the first track slider is arranged at the upper end of the first sliding arm, the first belt slider is slidably connected to the clamping movable track above the conveyor belt, and the first track slider is fixedly connected to the first track slider;

[0009] The second sliding arm comprises a second track slider, the second track slider is arranged at the upper end of the second sliding arm, the second track slider is slidably connected to the clamping movable track below the conveyor belt, and the second belt slider is fixedly connected to the second track slider;

[0010] The first sliding arm and the second sliding arm both include a clamping member, and the clamping member also includes a clamping arm, a clamping cylinder, a cylinder mounting plate and a limit plate. The cylinder mounting plate is arranged at the lower part of the first sliding arm or the second sliding arm, and the clamping cylinder, the limit plate and the clamping arm are arranged on the cylinder mounting plate in sequence, and the clamping cylinder is located on the inner side between the first sliding arm and the second sliding arm, and the clamping arm is located on the outer side between the first sliding arm and the second sliding arm, the clamping arm is rotatably connected to the cylinder mounting plate, and the output end of the clamping cylinder is connected to the clamping arm, and the end of the clamping arm away from the cylinder mounting plate is L-shaped, and the end of the limit plate away from the cylinder mounting plate can abut against the upper end wall of the PCB board. After the clamping arm rotates, the end away from the cylinder mounting plate can abut against the lower end wall of the PCB board.

[0011] Optionally, the clamping arm has a clamping protrusion at one end away from the cylinder mounting plate, and the clamping protrusion includes anti-slip grooves, and the anti-slip grooves are arranged on the end surface of the clamping protrusion that can abut against the PCB board.

[0012] Optionally, it also includes a left mounting bracket, a right mounting bracket and a drag chain, the left mounting bracket and the right mounting bracket are respectively arranged on both sides of the middle mounting plate, and the left mounting bracket and the right mounting bracket are both arranged on the front side of the middle mounting plate, the number of the drag chains is two, the two drag chains are respectively installed on the left mounting bracket and the right mounting bracket, and the two drag chains move with the movement of the first sliding arm and the second sliding arm respectively.

[0013] Optionally, it further includes an upper connecting bracket, the number of which is two, and the two upper connecting brackets are both arranged in the middle of the middle mounting plate.

[0014] Optionally, the left mounting frame and the middle mounting plate form a left mounting space, and the driven wheel, the first belt slider and the first track slider are all arranged in the left mounting space;

[0015] The right installation frame and the middle installation plate form a right installation space, and the output end of the motor is located in the right installation space.

[0016] The technical solution of the utility model has the following beneficial effects:

[0017] By setting up a frame, a motor, a transmission assembly, a clamping moving track, a first sliding arm, a second sliding arm and a clamping member, the operation of automatic loading and unloading can be realized, thereby improving the processing efficiency. When the PCB board is clamped by the PCB loading and unloading clamp of the tin spraying machine, the motor can be started, and the output end of the motor drives the conveyor belt to rotate, so that the upper and lower parts of the conveyor belt move toward each other, thereby driving the first sliding arm and the second sliding arm to move closer to or away from each other through the first belt slider, the first track slider, the second belt slider and the second track slider.

[0018] When the PCB board loading operation is performed, the PCB board loading and unloading fixture of the tin-spraying machine is transferred to the preset loading position through the above-mentioned manipulator or conveying mechanism, and then the conveyor belt is driven by the motor to rotate, so that the first belt slider, the first track slider, the second belt slider and the second track slider drive the first sliding arm and the second sliding arm to move away from each other, so that the PCB board loading and unloading fixture of the tin-spraying machine is changed from the closed state to the open state. Then the PCB board loading and unloading fixture of the tin-spraying machine is further transferred by the manipulator or conveying mechanism, so that the first sliding arm and the second sliding arm are aligned with the PCB board to be processed, and then the conveyor belt is driven by the motor to rotate, so that the first belt slider, the first track slider, the second belt slider and the second track slider drive the first sliding arm and the second sliding arm to move closer to each other, so that the limit plate and the end face of the PCB board are in contact, and then the clamping arm is driven to rotate by the clamping cylinder to clamp the PCB board to be processed, so as to complete the loading operation. When the PCB board is completed with the tin-spraying process, the above operation is performed in reverse, and the PCB board can be put down to complete the unloading operation.

[0019] In some cases, if the PCB boards to be processed are of the same model and the same size, there is no need to drive the first sliding arm and the second sliding arm to move closer to or away from each other through a motor. The PCB board loading and unloading fixture of the tin-spraying machine is only transferred to the preset loading position through a manipulator or a conveying mechanism, so that the limit plate abuts against the end face of the PCB board, and then the clamping arm is driven to rotate by the clamping cylinder to clamp the PCB board to be processed, thereby completing the loading operation; when the PCB board is completed by the tin-spraying process, the above operation is performed in reverse, and the PCB board can be put down to complete the unloading operation. In the above case, only when the PCB board loading and unloading fixture of the tin-spraying machine is used to process different models, and the size of the PCB board to be processed is different from that of the current PCB board to be processed, the first sliding arm and the second sliding arm are driven by a motor to move closer to or away from each other, so as to adapt to the clamping and fixation of PCB boards of different models and sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1 The overall structure of a PCB loading and unloading fixture of a tin spraying machine according to an embodiment of the utility model is shown in FIG. Figure 1 ;

[0022] Figure 2 The schematic diagram of the exploded structure of a PCB loading and unloading fixture of a tin spraying machine according to an embodiment of the utility model is shown in FIG. Figure 1 ;

[0023] Figure 3 The schematic diagram of the exploded structure of a PCB loading and unloading fixture of a tin spraying machine according to an embodiment of the utility model is shown in FIG. Figure 2 ;

[0024] Figure 4 The present invention is a schematic structural diagram of a clamping cylinder of a PCB loading and unloading fixture of a tin spraying machine according to an embodiment of the present invention.

[0025] Explanation of the accompanying figures: frame 100, middle mounting plate 110, left mounting frame 120, right mounting frame 130, upper connecting bracket 140, left mounting bracket 150, right mounting bracket 160, motor 200, conveyor belt 300, first belt slider 310, second belt slider 320, clamping moving track 400, first sliding arm 500, second sliding arm 600, second track slider 610, clamping member 700, clamping arm 710, clamping cylinder 720, cylinder mounting plate 730, limit plate 740, drag chain 800.

[0026] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0030] The utility model provides a PCB board loading and unloading fixture for a tin spraying machine.

[0031] like Figures 1 to 4 As shown, in one embodiment of the utility model, the PCB board loading and unloading fixture of the tin spraying machine includes a frame 100, a motor 200, a transmission assembly, a clamping and moving track 400, a drag chain 800, a first sliding arm 500, a second sliding arm 600 and a clamping member 700. In this embodiment, the motor 200, the transmission assembly, the clamping and moving track 400, the drag chain 800, the first sliding arm 500 and the second sliding arm 600 are all arranged on the frame 100, and the clamping member 700 is two groups, and the two groups of clamping members 700 are respectively arranged at the lower part of the first sliding arm 500 and the second sliding arm 600, and the side where the drag chain 800 is arranged is the front of the PCB board loading and unloading fixture of the tin spraying machine, and the opposite side is the rear thereof, and the front-back, top-bottom and bottom positions described in the following content of each component and structure are consistent with the above-mentioned front-back, top-bottom and bottom positions.

[0032] like Figures 1 to 3 As shown, in this embodiment, the rack 100 includes a middle mounting plate 110, a left mounting frame 120, a right mounting frame 130, a left mounting bracket 150, a right mounting bracket 160, and an upper connecting bracket 140. Specifically, the left mounting frame 120 and the left mounting bracket 150 are both arranged on the left side of the middle mounting plate 110, and the right mounting frame 130 and the right mounting bracket 160 are both arranged on the right side of the middle mounting plate 110, wherein the left mounting frame 120 and the right mounting frame 130 are both arranged at the rear of the middle mounting plate 110, and the left mounting bracket 150 and the right mounting bracket 160 are both arranged on the front side of the middle mounting plate 110; in addition, there are two upper connecting brackets 140, and the two upper connecting brackets 140 are both arranged in the middle of the middle mounting plate 110, and the upper part of the upper connecting bracket 140 extends upward.

[0033] In this embodiment, the motor 200, transmission assembly, clamping movable track 400, first sliding arm 500 and second sliding arm 600 are all arranged between the middle mounting plate 110, the left mounting frame 120 and the right mounting frame 130, and are installed through connectors. Secondly, the number of the drag chains 800 is specifically two, and the two drag chains 800 are respectively installed at the left mounting bracket 150 and the right mounting bracket 160, and the two drag chains 800 move with the movement of the first sliding arm 500 and the second sliding arm 600. Finally, the upper connecting bracket 140 is used to connect with a manipulator or a conveying structure. For example, the manipulator can be connected to the PCB board loading and unloading fixture of the tin spraying machine through the upper connecting bracket 140, so as to transfer the PCB board loading and unloading fixture of the tin spraying machine and the PCB board between the loading place, the processing place and the unloading place according to the actual needs of the tin spraying process. It is worth noting that the PCB loading and unloading fixture of the tin-spraying machine disclosed in the present invention is a fixture for clamping PCB boards. Users can connect the PCB loading and unloading fixture of the tin-spraying machine with a robot or a conveying mechanism through the upper connecting bracket 140 according to actual needs. Since the robot and the conveying mechanism do not belong to the structures required to be protected by the PCB loading and unloading fixture of the tin-spraying machine, they will not be described in detail in this embodiment.

[0034] In this embodiment, the number of the clamping movable rails 400 is specifically two, and the two clamping movable rails 400 are both arranged on the rear side of the middle mounting plate 110 , and the two clamping movable rails 400 are both arranged along the length direction of the middle mounting plate 110 .

[0035] like Figures 1 to 3 As shown, in this embodiment, the transmission assembly includes a conveyor belt 300, a driven wheel, a first belt slider 310 and a second belt slider 320, the driven wheel specifically includes a mounting shaft and a rotating wheel, and the rotating wheel can rotate with the mounting shaft. In addition, the middle mounting plate 110 includes a left mounting hole and a right mounting hole. Specifically, the driven wheel is fixedly installed between the middle mounting plate 110 and the left mounting frame 120, and the front end of the mounting shaft passes through the left mounting hole and is fixedly connected to the middle mounting plate 110 through the mounting block, while the rear end of the mounting shaft is fixedly connected to the left mounting frame 120; secondly, the output end of the motor 200 passes through the right mounting hole and is rotatably connected to the right mounting frame 130, the conveyor belt 300 is arranged around the output end of the motor 200 and the driven wheel, and the conveyor belt 300 is located between the two clamping movable rails 400, the first belt slider 310 is arranged at the lower part of the left side of the conveyor belt 300, and the second belt slider 320 is arranged at the upper part of the right side of the conveyor belt 300. In this embodiment, the conveyor belt 300 is divided into two upper and lower parts due to the output end and the driven wheel of the motor 200, and the two clamping movable rails 400 are respectively arranged above and below the conveyor belt 300, and the length direction of the clamping movable rails 400 is the same as the length direction of the conveyor belt 300.

[0036] Furthermore, the left mounting frame 120 and the middle mounting plate 110 form a left mounting space, and the driven wheel, the first belt slider 310 and the first track slider are all arranged in the left mounting space. The right mounting frame 130 and the middle mounting plate 110 form a right mounting space, and the output end of the motor 200 is located in the right mounting space. This structure is conducive to shielding and accommodating the driven wheel, the first belt slider 310, the first track slider and the output end of the motor 200.

[0037] like Figures 1 to 3 As shown, in this embodiment, the first sliding arm 500 specifically includes a first track slider, which is arranged at the upper end of the first sliding arm 500, the first belt slider 310 is slidably connected to the clamping and moving track 400 above the conveyor belt 300, and the first track slider is fixedly connected to the first track slider. The second sliding arm 600 includes a second track slider 610, which is arranged at the upper end of the second sliding arm 600, the second track slider 610 is slidably connected to the clamping and moving track 400 below the conveyor belt 300, and the second belt slider 320 is fixedly connected to the second track slider 610. When the motor 200 is started, the output end of the motor 200 drives the conveyor belt 300 to rotate, and the upper and lower parts of the conveyor belt 300 move toward each other, so that the first sliding arm 500 and the second sliding arm 600 are driven to approach or move away from each other through the first belt slider 310, the first track slider, the second belt slider 320 and the second track slider 610.

[0038] like Figures 1 to 4As shown, in this embodiment, a group of clamping members 700 includes a total of four clamping members 700, and the four clamping members 700 are arranged at intervals at the lower part of the first sliding arm 500 or the second sliding arm 600; in addition, the clamping member 700 specifically includes a clamping arm 710, a clamping cylinder 720, a cylinder mounting plate 730 and a limiting plate 740. Specifically, the cylinder mounting plate 730 is arranged at the lower part of the first sliding arm 500 or the second sliding arm 600, the clamping cylinder 720, the limiting plate 740 and the clamping arm 710 are arranged in sequence from one side to the other side of the cylinder mounting plate 730, and the clamping cylinder 720 is located at the inner side between the first sliding arm 500 and the second sliding arm 600, and the clamping arm 710 is located at the outer side between the first sliding arm 500 and the second sliding arm 600. Further, the clamping arm 710 is U-shaped, and the length of one side of the clamping arm 710 is shorter than the length of the other side, the longer side of the clamping arm 710 is a broken line, and the middle part of the longer side of the clamping arm 710 is rotatably connected to the cylinder mounting plate 730, and the rear end is rotatably connected to the output end of the clamping cylinder 720. In this embodiment, the clamping cylinder 720 can drive the clamping arm 710 to rotate around the cylinder mounting plate 730, so as to adjust the clamping arm 710 to adapt to the width of different PCB boards. Further, the end of the clamping arm 710 away from the cylinder mounting plate 730 is L-shaped, and the end of the limit plate 740 away from the cylinder mounting plate 730 can abut against the upper end wall of the PCB board. After the clamping arm 710 rotates, the end away from the cylinder mounting plate 730 can abut against the PCB board. In addition, one end of the clamping arm 710 away from the cylinder mounting plate 730 has a clamping protrusion, and the clamping protrusion includes anti-slip grooves, and the anti-slip grooves are arranged on the end surface of the clamping protrusion that can abut against the PCB board.

[0039] When the PCB board is clamped by the PCB loading and unloading fixture of the tin spraying machine, the PCB board can be abutted against the side wall of the longer side of the clamping arm 710, the end face of the shorter side and the end face of the limit plate 740, thereby stably clamping the PCB board.

[0040] Specifically, the working principle and process of the utility model are:

[0041] By setting up a frame, a motor, a transmission assembly, a clamping moving track, a first sliding arm, a second sliding arm and a clamping member, the operation of automatic loading and unloading can be realized, thereby improving the processing efficiency. When the PCB board is clamped by the PCB loading and unloading clamp of the tin spraying machine, the motor can be started, and the output end of the motor drives the conveyor belt to rotate, so that the upper and lower parts of the conveyor belt move toward each other, thereby driving the first sliding arm and the second sliding arm to move closer to or away from each other through the first belt slider, the first track slider, the second belt slider and the second track slider.

[0042] When the PCB board loading operation is performed, the PCB board loading and unloading fixture of the tin-spraying machine is transferred to the preset loading position through the above-mentioned manipulator or conveying mechanism, and then the conveyor belt is driven by the motor to rotate, so that the first belt slider, the first track slider, the second belt slider and the second track slider drive the first sliding arm and the second sliding arm to move away from each other, so that the PCB board loading and unloading fixture of the tin-spraying machine is changed from the closed state to the open state. Then the PCB board loading and unloading fixture of the tin-spraying machine is further transferred by the manipulator or conveying mechanism, so that the first sliding arm and the second sliding arm are aligned with the PCB board to be processed, and then the conveyor belt is driven by the motor to rotate, so that the first belt slider, the first track slider, the second belt slider and the second track slider drive the first sliding arm and the second sliding arm to move closer to each other, so that the limit plate and the end face of the PCB board are in contact, and then the clamping arm is driven to rotate by the clamping cylinder to clamp the PCB board to be processed, so as to complete the loading operation. When the PCB board is completed with the tin-spraying process, the above operation is performed in reverse, and the PCB board can be put down to complete the unloading operation.

[0043] In some cases, if the PCB boards to be processed are of the same model and the same size, there is no need to drive the first sliding arm and the second sliding arm to move closer to or away from each other through a motor. The PCB board loading and unloading fixture of the tin-spraying machine is only transferred to the preset loading position through a manipulator or a conveying mechanism, so that the limit plate abuts against the end face of the PCB board, and then the clamping arm is driven to rotate by the clamping cylinder to clamp the PCB board to be processed, thereby completing the loading operation; when the PCB board is completed by the tin-spraying process, the above operation is performed in reverse, and the PCB board can be put down to complete the unloading operation. In the above case, only when the PCB board loading and unloading fixture of the tin-spraying machine is used to process different models, and the size of the PCB board to be processed is different from that of the current PCB board to be processed, the first sliding arm and the second sliding arm are driven by a motor to move closer to or away from each other, so as to adapt to the clamping and fixation of PCB boards of different models and sizes.

[0044] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A PCB loading and unloading fixture for a tin spraying machine, characterized in that: It includes a frame, a motor, a transmission assembly, a clamping moving track, a first sliding arm and a second sliding arm; The frame includes a middle mounting plate, a left mounting frame and a right mounting frame, the left mounting frame and the right mounting frame are respectively arranged on both sides of the middle mounting plate, the number of the clamping movable rails is two, the two clamping movable rails are both arranged on the rear side of the middle mounting plate, and the two clamping movable rails are both arranged along the length direction of the middle mounting plate; The transmission assembly includes a conveyor belt, a driven wheel, a first belt slider and a second belt slider, the driven wheel is fixedly installed between the middle mounting plate and the left mounting frame, and the two ends of the driven wheel are respectively fixedly connected to the left mounting frame and the middle mounting plate, the middle mounting plate includes a right mounting hole, the output end of the motor passes through the right mounting hole and is rotatably connected to the right mounting frame, the conveyor belt is arranged around the output end of the motor and the driven wheel, and the conveyor belt is located between two clamping movable rails, the first belt slider is arranged at the lower part of the conveyor belt, and the second belt slider is arranged at the upper part of the conveyor belt; The first sliding arm comprises a first track slider, the first track slider is arranged at the upper end of the first sliding arm, the first belt slider is slidably connected to the clamping movable track above the conveyor belt, and the first track slider is fixedly connected to the first track slider; The second sliding arm comprises a second track slider, the second track slider is arranged at the upper end of the second sliding arm, the second track slider is slidably connected to the clamping movable track below the conveyor belt, and the second belt slider is fixedly connected to the second track slider; The first sliding arm and the second sliding arm both include a clamping member, and the clamping member also includes a clamping arm, a clamping cylinder, a cylinder mounting plate and a limit plate. The cylinder mounting plate is arranged at the lower part of the first sliding arm or the second sliding arm, and the clamping cylinder, the limit plate and the clamping arm are arranged on the cylinder mounting plate in sequence, and the clamping cylinder is located on the inner side between the first sliding arm and the second sliding arm, and the clamping arm is located on the outer side between the first sliding arm and the second sliding arm, the clamping arm is rotatably connected to the cylinder mounting plate, and the output end of the clamping cylinder is connected to the clamping arm, and the end of the clamping arm away from the cylinder mounting plate is L-shaped, and the end of the limit plate away from the cylinder mounting plate can abut against the upper end wall of the PCB board. After the clamping arm rotates, the end away from the cylinder mounting plate can abut against the lower end wall of the PCB board.

2. The PCB loading and unloading fixture of the tin spraying machine according to claim 1 is characterized in that: One end of the clamping arm away from the cylinder mounting plate is provided with a clamping protrusion, and the clamping protrusion includes anti-slip grooves, and the anti-slip grooves are arranged on the end surface of the clamping protrusion that can abut against the PCB board.

3. The PCB loading and unloading fixture of the tin spraying machine according to claim 1 is characterized in that: It also includes a left mounting bracket, a right mounting bracket and a drag chain, wherein the left mounting bracket and the right mounting bracket are respectively arranged on both sides of the middle mounting plate, and the left mounting bracket and the right mounting bracket are both arranged on the front side of the middle mounting plate. There are two drag chains, which are respectively installed on the left mounting bracket and the right mounting bracket, and the two drag chains move with the movement of the first sliding arm and the second sliding arm respectively.

4. The PCB loading and unloading fixture of the tin spraying machine according to claim 1 is characterized in that: It also includes two upper connecting brackets, and both of the two upper connecting brackets are arranged in the middle of the middle mounting plate.

5. The PCB loading and unloading fixture of the tin spraying machine according to claim 1 is characterized in that: The left mounting frame and the middle mounting plate form a left mounting space, and the driven wheel, the first belt slider and the first track slider are all arranged in the left mounting space; The right installation frame and the middle installation plate form a right installation space, and the output end of the motor is located in the right installation space.

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