PCB test equipment with adjustable test spacing

Abstract

The invention discloses a PCB test device with an adjustable test interval. The PCB test device comprises a machine table; the fixed seat is arranged on the machine table and is provided with a guide rail along the front-back direction; the second mounting plates are arranged on the fixed seat in the left-right direction, and the number of the second mounting plates is at least two; the third mounting plates are movably arranged on the guide rails in the left-right direction and located on the rear sides of the second mounting plates, and the number of the third mounting plates is in one-to-one correspondence with that of the second mounting plates; the pulley block is arranged on the opposite side surfaces of the second mounting plate and the third mounting plate; the belt is movably arranged on the pulley block in the left-right direction and used for conveying workpieces; the driving part is arranged on the machine table and used for driving the third mounting plate to move front and back along the guide rails. The distance between the third mounting plate and the second mounting plate is adjusted by driving the third mounting plate to move back and forth on the guide rail through the driving piece, so that placement and feeding of PCBs of different specifications are adapted, the same equipment can be used for testing various PCBs of different specifications, the testing cost is reduced, and meanwhile, the testing efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of dispensing equipment, and in particular to a PCB testing device with adjustable test spacing. Background Art

[0002] In the mass production process of PCBs, due to factors such as the operating state of the equipment and the human factors of the operator, it is impossible to ensure that all the produced PCBs are perfect products. This requires adding various testing equipment and testing tools at the end of production to ensure that all the assembled circuit boards delivered from the factory are completely consistent with various specifications and parameters during design.

[0003] Currently, the testing types on the market include but are not limited to performance testing, PCB burning, and FCT testing. However, test products of different specifications of the machine cannot be compatible, and new products require new testing machines, resulting in low testing efficiency, and multiple testing machines lead to an increase in testing costs and the floor area occupied by the testing equipment. Summary of the Invention

[0004] The present invention provides a PCB testing device with adjustable test spacing, aiming to solve at least one of the technical problems existing in the prior art.

[0005] The technical solution of the present invention relates to a PCB testing device with adjustable test spacing, including: a machine table; a fixed seat arranged on the machine table, and a guide rail is arranged on the fixed seat along the front-rear direction; a second mounting plate arranged on the fixed seat along the left-right direction, and there are at least two second mounting plates; a third mounting plate movably arranged on the guide rail along the left-right direction and located behind the second mounting plate, and the number of the third mounting plates corresponds to that of the second mounting plates one by one; a pulley group arranged on the opposite sides of the second mounting plate and the third mounting plate; a belt movably arranged on the pulley group along the left-right direction, and the belt is used for transporting workpieces; a driving member arranged on the machine table, and the driving member is used for driving the third mounting plate to move back and forth along the guide rail.

[0006] According to some embodiments of the present invention, it further includes: a frame arranged on the machine table; a first guide post arranged below the frame along the up-down direction; a first mounting plate movably connected to the first guide post; an upper needle plate assembly connected to the lower part of the first mounting plate and detachably connected to the first mounting plate; a second guide post movably connected to the first mounting plate along the up-down direction and the column body passes through the first mounting plate, and a limit ring is arranged above the second guide post, and the limit ring is used for keeping the second guide post on the first mounting plate, and the fixed seat is connected to the lower end of the second guide post; a limit block arranged below the fixed seat, and used for limiting the descending height of the fixed seat; a driving assembly arranged on the frame, and used for driving the first mounting plate to move up and down.

[0007] In some embodiments of the present invention, a spring is further provided at the upper end of the second guide post. The upper end of the spring is connected to the limit ring, and a stop block for abutting against the lower end of the spring is provided on the mounting plate.

[0008] In some embodiments of the present invention, the column body of the first guide post passes through the fixed seat, and a guide sleeve is provided at the position where the first guide post contacts the fixed seat.

[0009] In some embodiments of the present invention, a guide bar is further included, and the guide bar is arranged on the second mounting plate and the third mounting plate along the direction of the belt.

[0010] In some embodiments of the present invention, the driving assembly includes: a lifting cylinder, arranged above the frame, and the output end is connected to the first mounting plate; a third guide post, arranged on the frame, and the lower end of the third guide post is connected to the first mounting plate.

[0011] In some embodiments of the present invention, a fourth mounting plate is provided above the third guide post, and a buffer member is provided on the fourth mounting plate. The buffer member is used to slow down the impact force when the first mounting plate descends.

[0012] In some embodiments of the present invention, the buffer member includes a buffer post arranged on the fourth mounting plate and a spring arranged below the buffer post.

[0013] In some embodiments of the present invention, two mounting strips are provided on the machine table, and further include: a lower needle plate assembly, detachably arranged on the machine table and located between the two mounting strips; a carrier plate, arranged on the machine table and located between the upper needle plate assembly and the lower needle plate assembly.

[0014] In some embodiments of the present invention, two fixing strips are provided below the first mounting plate, and two fixing members are detachably provided above. A gap is formed between the two fixing strips and the first mounting plate. The top of the upper needle plate assembly is inserted into the gap and fixed by the fixing members.

[0015] In some embodiments of the present invention, the upper needle plate assembly includes: an insertion plate, movably inserted into the gap; a first box body, connected to the lower part of the insertion plate; an upper needle plate, arranged below the first box body. The upper needle plate is connected to the insertion plate through a connecting column, and the first box body is used for storing the connecting wires in the upper needle plate.

[0016] According to some embodiments of the present invention, a fixing block is provided on the machine table, a fixing member is detachably provided on the fixing block, an installation block is provided on the lower needle plate assembly, and the fixing member is used to limit the installation block on the fixing block, so that the lower needle plate assembly is limited below the upper needle plate assembly.

[0017] According to some embodiments of the present invention, the lower needle plate assembly includes: a bottom plate, movably arranged between two installation strips, the installation block is arranged on the side of the bottom plate; a second box body, arranged on the bottom plate; a lower needle plate, arranged above the second box body, and the second box body is used to accommodate the connecting wires on the lower needle plate.

[0018] According to some embodiments of the present invention, a connecting plate is further provided at the upper end of the second box body, and one side of the lower needle plate is hinged to the connecting plate through a hinge.

[0019] According to some embodiments of the present invention, a support plate and a support bar are provided on the bottom plate, a horizontal chute is provided on the support plate, a vertical chute is provided at one end of the chute, one end of the support bar is hinged to the lower end of the side of the bottom plate away from the hinge, and the other end is hinged with a knob, and the middle section of the knob is movably arranged in the chute.

[0020] According to some embodiments of the present invention, barbs are further provided on the side of the lower needle plate away from the hinge, and a connecting ring for fixing the barbs is provided on the side of the second box body.

[0021] According to some embodiments of the present invention, a slide rail is provided on the machine table, a slider is movably connected to the slide rail, an installation frame is provided on the slider, and the carrier plate is detachably connected to the installation frame through a connecting rod.

[0022] According to some embodiments of the present invention, a top rod is further provided on the slider, a spring is provided at the lower end of the top rod, the upper end abuts against the carrier plate, and a guide rod is further provided below the carrier plate, and the rod body of the guide rod is movably arranged in the installation frame.

[0023] The beneficial effects of the present invention are as follows:

[0024] 1. By driving the third installation plate to move back and forth on the guide rail, the distance between the third installation plate and the second installation plate is adjusted, so as to adapt to the placement and feeding of PCB boards of different specifications. The same device can be used to test multiple PCB boards of different specifications, reducing the test cost and improving the test efficiency at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of the PCB testing device according to the first embodiment of the present invention (hiding the frame);

[0026] Figure 2 It is a schematic structural diagram of the frame and the upper needle plate assembly according to an embodiment of the present invention;

[0027] Figure 3 It is a schematic structural diagram of the lower needle plate assembly according to an embodiment of the present invention (hiding the side plate);

[0028] Figure 4 It is a schematic structural diagram of the carrier plate and the installation strip according to an embodiment of the present invention;

[0029] Figure 5 It is a schematic structural diagram of the PCB testing device according to the second embodiment of the present invention (hiding the frame);

[0030] Figure 6 It is a schematic structural diagram of the wire body assembly according to an embodiment of the present invention.

[0031] Reference numerals in the drawings:

[0032] Machine table 100, frame 110, first guide post 120, first mounting plate 130, fixing strip 131, fixing member 132, limiting block 140, mounting strip 150, fixing block 160, slide rail 170, mounting bracket 180, ejector rod 190, guide rod 191;

[0033] Upper needle plate assembly 200, plug board 210, first box body 220, upper needle plate 230;

[0034] Lower needle plate assembly 300, bottom plate 310, mounting block 311, support plate 312, chute 3121, vertical chute 3122, support strip 313, knob 3131, second box body 320, connecting plate 321, hinge 322, connecting ring 323, lower needle plate 330, barb 331;

[0035] Carrier plate 400;

[0036] Drive assembly 500, lifting cylinder 510, third guide post 520, fourth mounting plate 530, buffer post 540;

[0037] Wire body assembly 600, fixed seat 610, guide rail 611, guide sleeve 612, second mounting plate 620, guide strip 621, third mounting plate 630, pulley group 640, belt 650, drive member 660, transmission wheel group 670, lead screw 680, second guide post 690, limiting ring 691, spring 692. Detailed implementation manners

[0038] The following content will describe several embodiments of the present invention, including the embodiments corresponding to the drawings. It can be understood that the drawings are used to assist in understanding the technical features and technical solutions of the present invention, and should not be construed as limiting the protection scope of the present invention.

[0039] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in combination with the embodiments and the drawings, so as to fully understand the purpose, solution and effects of the present invention. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0040] It should be noted that unless otherwise clearly defined, when a feature is referred to as "fixed", "connected", "installed", "set" on another feature, it can be directly "fixed", "connected", "installed", "set" on another feature, or indirectly "fixed", "connected", "installed", "set" on another feature. The words such as "fixed", "connected", "installed", "set" should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0041] It should be noted that the descriptions of the orientation or positional relationship indicated by up, down, left, right, top, bottom, front, back, inside, outside, etc. in the present invention are based on the orientation or positional relationship of the drawings or embodiments, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0042] It should be noted that the term "and / or" used in the present invention includes any combination of one or more of the related listed items. The meaning of several is one or more, and the meaning of multiple is at least two. Understandings such as greater than, less than, exceeding, etc. do not include the present number, and understandings such as above, below, within, etc. include the present number.

[0043] It should be noted that if the first and the second are described in the present invention, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0044] It should be noted that unless otherwise clearly defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art of this technology. The terms used in the description of this specification are only for describing specific embodiments, rather than limiting the present invention.

[0045] Refer to Figures 1 to 6, the technical solution of the present invention relates to a PCB production line, including a machine table 100; a line body assembly 600, the line body assembly 600 includes: a fixed seat 610, arranged on the machine table 100, and a guide rail 611 is arranged on the fixed seat 610 along the front-back direction; a second mounting plate 620, arranged on the fixed seat 610 along the left-right direction, and at least two second mounting plates 620 are provided; a third mounting plate 630, movably arranged on the guide rail 611 along the left-right direction and located at the rear side of the second mounting plate 620, the number of the third mounting plates 630 corresponds to that of the second mounting plates 620 one by one. In this embodiment, two second mounting plates 620 and two third mounting plates 630 are provided respectively, and the two second mounting plates 620 and the two third mounting plates 630 are respectively connected with a belt 650 through a pulley group 640; the pulley group 640 is arranged on the opposite sides of the second mounting plate 620 and the third mounting plate 630; the belt 650 is movably arranged on the pulley group 640 along the left-right direction, and the belt 650 is used for transporting workpieces; a driving member 660, arranged on the machine table 100, and the driving member 660 is used for driving the third mounting plate 630 to move back and forth along the guide rail 611.

[0046] In this embodiment, the driving member 660 is set as a motor, the motor is arranged at the rear side of one of the third mounting plates 630, a lead screw 680 is connected to the output shaft of the motor, a nut threadedly connected to the lead screw 680 is arranged on the third mounting plate 630 on this side, nuts are also arranged on the third mounting plate 630 on the other side, and lead screws 680 are threadedly connected thereto. The two lead screws 680 are arranged parallel to the guide rail 611, and the two lead screws 680 are connected through a transmission pulley group 670, and the two third mounting plates 630 are driven to move back and forth simultaneously by the motor.

[0047] In some other embodiments, a motor can also be arranged at the rear side of each third mounting plate 630 to realize the synchronous back-and-forth movement of multiple third mounting plates 630.

[0048] According to the PCB test module with automatic loading in the test equipment of the present invention, it further includes: a frame 110, arranged on the machine table 100; a first guide post 120, arranged below the frame 110 along the up-down direction; a first mounting plate 130, movably connected to the first guide post 120; an upper needle plate assembly 200, connected to the lower side of the first mounting plate 130 and detachably connected to the first mounting plate 130; a second guide post 690, movably connected to the first mounting plate 130 along the up-down direction and the column body penetrates through the first mounting plate 130, a limit ring 691 is arranged above the second guide post 690, and the limit ring 691 is used for keeping the second guide post 690 on the first mounting plate 130, and the fixed seat 610 is connected to the lower end of the second guide post 690; a limit block 140, arranged below the fixed seat 610, and used for limiting the descending height of the fixed seat 610; a driving assembly 500, arranged on the frame 110, and used for driving the first mounting plate 130 to move up and down.

[0049] During the testing process, the driving component 500 drives the first mounting plate 130 upward. The first mounting plate 130 drives the upper needle plate assembly 200 to move upward. At the same time, after the first mounting plate 130 abuts against the limiting ring 691 upward, it drives the fixing seat 610 to move upward synchronously. Until the belt 650 is flush with the external wire body, the workpiece to be tested is input onto the belt by the external wire body. After the workpiece reaches the set position, the driving component 500 drives the first mounting plate 130 to move downward, and the upper needle plate assembly 200 and the fixing seat 610 move downward together. Until the fixing seat 610 abuts against the limiting block 140, the fixing seat 610 stops moving. At this time, the lower end of the workpiece abuts against the carrier plate 400. Under the action of the driving component 500, the first mounting plate 130 continues to move downward, that is, the upper needle plate assembly 200 continues to move downward. Until the upper needle plate 230 abuts against the workpiece, it drives the workpiece and the carrier plate 400 to continue to move downward and compress the spring 692 below the ejector rod 190. Until the lower end of the workpiece contacts the lower needle plate 330, the test starts. During the process, interference between the workpiece and the testing equipment during feeding can be avoided.

[0050] According to some embodiments of the present invention, a spring 692 is further provided at the upper end of the second guide post 690. The upper end of the spring 692 is connected to the limiting ring 691. A stop block for abutting against the lower end of the spring 692 is provided on the mounting plate. By setting springs 692 with different lengths, the lifting height of the wire body assembly 600 is controlled, so as to adapt to external wire bodies of different heights and improve the overall versatility of the testing equipment.

[0051] According to some embodiments of the present invention, the column body of the first guide post 120 passes through the fixing seat 610, and a guide sleeve 612 is provided at the position where the first guide post 120 contacts the fixing seat 610. The first guide post 120 also plays a guiding role for the fixing seat 610 to ensure that the up and down movement of the fixing seat 610 is consistent with that of the upper needle plate assembly 200.

[0052] According to some embodiments of the present invention, a guide bar 621 is further included. The guide bar 621 is arranged on the second mounting plate 620 and the third mounting plate 630 along the direction of the belt 650. The guide bar 621 is used to ensure the traveling direction of the workpiece on the two belts 650 and avoid skewing during the moving process.

[0053] According to some embodiments of the present invention, the driving assembly 500 includes: a lifting cylinder 510, disposed above the frame 110, and an output end connected to the first mounting plate 130; a third guide post 520, disposed on the frame 110, a lower end of the third guide post 520 connected to the first mounting plate 130, a fourth mounting plate 530 provided above the third guide post 520, a buffer member provided on the fourth mounting plate 530, the buffer member being configured to mitigate the impact force when the first mounting plate 130 descends, the buffer member including a buffer post 540 provided on the fourth mounting plate 530 and a spring 692 provided below the buffer post 540. During the process of driving the upper needle plate assembly 200 to descend, after the spring 692 contacts the frame 110, it buffers the buffer post 540 and the fourth mounting plate 530, and further enables the first mounting plate 130 to receive a buffering effect, so that the force when the upper needle plate assembly 200 contacts the workpiece can be more gentle and smooth, avoiding damaging the workpiece.

[0054] The testing device of the present invention further involves a quick-change mechanism. Among them, two mounting strips 150 are provided on the machine table 100, and it further includes: a lower needle plate assembly 300, detachably disposed on the machine table 100 and located between the two mounting strips 150; a carrier plate 400, disposed on the machine table 100 and located between the upper needle plate assembly 200 and the lower needle plate assembly 300.

[0055] According to some embodiments of the present invention, two fixing strips 131 are provided below the first mounting plate 130, and two fixing members 132 are detachably provided above. A gap is formed between the two fixing strips 131 and the first mounting plate 130. The top of the upper needle plate assembly 200 is inserted into the gap and fixed by the fixing members 132. The upper needle plate assembly 200 includes: an insertion plate 310, movably inserted into the gap; a first box body 220, connected to the lower side of the insertion plate 310; an upper needle plate 230, disposed below the first box body 220, the upper needle plate 230 being connected to the insertion plate 310 through a connecting column. The first box body 220 is used to accommodate the connecting wires in the upper needle plate 230. The insertion plate 310 in the upper needle plate assembly 200 is inserted into the gap in the form of a drawer and fixed by the fixing members 132 to complete the installation of the upper needle plate assembly 200. The operation is simple and convenient for quick replacement. The fixing members 132 can be set as pins or bolts.

[0056] According to some embodiments of the present invention, a fixing block 160 is provided on the machine platform 100, a fixing member 132 is detachably provided on the fixing block 160, a mounting block 311 is provided on the lower needle plate assembly 300, and the fixing member 132 is used to limit the mounting block 311 on the fixing block 160, so that the lower needle plate assembly 300 is restricted below the upper needle plate assembly 200. The lower needle plate assembly 300 also adopts the form of a drawer. Different from the upper needle plate assembly 300, a mounting block 311 is provided on the side surface of the bottom plate 310 in the lower needle plate assembly 300. The mounting block 311 and the fixing block 160 can be connected through the fixing member 132, so as to restrict the lower needle plate assembly 300 on the machine platform 100 and prevent it from moving, completing the installation and fixation of the lower needle plate assembly 300. The operation is simple and convenient for quick replacement. The fixing member 132 can be set as a bolt or a pin.

[0057] According to some embodiments of the present invention, the bottom plate 310 is movably arranged between two mounting strips 150. The shape of the mounting strips 150 is similar to a stepped shape, and both sides of the bottom plate 310 are movably arranged on the stepped surfaces of the two mounting strips 150; a second box body 320 is arranged on the bottom plate 310, and a handle is further provided on the side surface of the second box body 320, which can facilitate pulling out the lower needle plate assembly 300 outward; a lower needle plate 330 is arranged above the second box body 320, and the second box body 320 is used for storing the connecting wires on the lower needle plate 330.

[0058] According to some embodiments of the present invention, a connecting plate 321 is further provided at the upper end of the second box body 320. One side of the lower needle plate 330 is hinged to the connecting plate 321 through a hinge 322. A support plate 312 and a support strip 313 are provided on the bottom plate 310. A horizontal chute 3121 is provided on the support plate 312, and a vertical chute 3122 is provided at one end of the chute 3121. One end of the support strip 313 is hinged to the lower end of the side of the bottom plate 310 away from the hinge 322, and the other end is hinged with a knob 3131. The middle section of the knob 3131 is movably arranged in the chute 3121. By hinging the lower needle plate 330 to the connecting plate 321, the lower needle plate 330 can be opened from above to complete wiring or other maintenance work. When the unhinged side of the lower needle plate 330 is turned up, the side of the support strip 313 hinged to the lower needle plate 330 rotates upward, and the middle section of the knob 3131 on the other side slides in the chute 3121 until it slides into the vertical chute 3122, and then the support strip 313 keeps still and supports the lower needle plate 330, without the need for additional manual support or support through other structures. The structure is simple and the operation is convenient.

[0059] According to some embodiments of the present invention, a barb 331 is further provided on the side surface of the lower needle plate 330 away from the hinge 322, and a connecting ring 323 for fixing the barb 331 is provided on the side surface of the second box body 320. The connecting ring 323 can lock the barb 331, so that the lower needle plate 330 cannot be opened.

[0060] According to the first embodiment of the present invention, a slide rail 170 is provided on the machine platform 100. A slider is movably connected to the slide rail 170. An installation frame 180 is provided on the slider. The carrier plate 400 is detachably connected to the installation frame 180 through a connecting rod. By dragging the carrier plate 400 outward from the machine platform 100, the carrier plate 400 is moved along the slide rail 170 away from the lower part of the upper needle plate assembly 200, so as to facilitate manually placing the workpiece to be tested or taking out the tested workpiece in the carrier plate 400. At the same time, the fixing member 132 on the connecting rod is removed, and different specifications of carrier plates 400 can be quickly replaced for workpieces of different specifications. A push rod 190 is also provided on the slider. A spring 692 is provided at the lower end of the push rod 190, and the upper end abuts against the carrier plate 400. The function of the spring 692 here has been described above and will not be elaborated here. A guide rod 191 is also provided below the carrier plate 400. The rod body of the guide rod 191 is movably arranged in the installation frame 180. The guide rod 191 is used to provide a guiding function for the carrier plate 400 during the up and down floating process.

[0061] The beneficial effects of the present invention are as follows:

[0062] 1. By driving the third mounting plate 630 to move back and forth on the guide rail 611 through the driving member 660, the distance between the third mounting plate 630 and the second mounting plate 620 is adjusted, so as to adapt to the placement and feeding of PCB boards of different specifications. The same equipment can be used to test a variety of PCB boards of different specifications, reducing the test cost and improving the test efficiency at the same time.

[0063] 2. The upper needle plate assembly 200 is detachably connected to the first mounting plate 130, and the lower needle plate assembly 300 is detachably arranged on the machine platform 100. Different specifications of upper needle plate assemblies 200 and lower needle plate assemblies 300 can be replaced for different test products, so that different test products can be tested on the same test equipment without the need to rely on an additional test machine platform 100, reducing the cost and floor space of the test equipment.

[0064] 3. Lift the first mounting plate 130 through the driving assembly 500, and the upper needle plate assembly 200 is lifted upward. Under the action of the limiting ring 691 of the second guide post 690, the wire body assembly 600 is lifted upward synchronously. When the wire body assembly 600 is flush with the external wire, a PCB board to be tested can be input into the wire body assembly 600 or the tested PCB board in the wire body assembly 600 can be output outward. During testing, the driving assembly 500 drives the first mounting plate 130 to descend along the first guide post 120, and the wire body assembly 600 descends synchronously until the lower part of the wire body assembly 600 abuts against the limiting block 140, and the wire body assembly 600 stops descending. The upper needle plate assembly 200 continues to descend under the drive of the driving assembly 500 until it abuts against the PCB board, and continues to press down until the PCB board falls on the carrier plate 400 and is docked with the lower needle plate assembly 300 below. The whole process does not require manual feeding, and the PCB board will not interfere with other components during the automatic loading and unloading process, and normal testing can be carried out, while improving the testing efficiency.

[0065] It should be noted that in this specification, terms such as "one embodiment", "some embodiments", "basic embodiment", "extended embodiment" can be used to describe several embodiments of the present invention. The specific features, structures, materials or characteristics in several embodiments can be combined under the premise of conforming to the principles and purposes of the present invention.

[0066] Although some embodiments of the present invention have been shown and described in this specification, the present invention should not be limited to the above embodiments. As long as it achieves the technical effects of the present invention by the same or equivalent means, any changes, modifications, equivalent replacements and equivalent variations made to these embodiments within the spirit and principle of this disclosure without departing from the principles and purposes of the present invention should be included within the scope of protection of this disclosure and should be considered to belong to the scope of protection of the present invention.

Claims

1. A PCB test device with adjustable test spacing, characterized in that Including: Machine platform; Fixed seat, arranged on the machine platform, and a guide rail is arranged on the fixed seat along the front-back direction; Second mounting plate, arranged on the fixed seat along the left-right direction, and at least two second mounting plates are provided; Third mounting plate, movably arranged on the guide rail along the left-right direction and located at the rear side of the second mounting plate, and the number of the third mounting plates corresponds to that of the second mounting plates one by one; Pulley set, arranged on the opposite sides of the second mounting plate and the third mounting plate; Belt, movably arranged on the pulley set along the left-right direction, and the belt is used for transporting workpieces; Driving member, arranged on the machine platform, and the driving member is used for driving the third mounting plate to move back and forth along the guide rail.

2. The PCB testing device with adjustable test spacing according to claim 1, characterized in that It further includes: Frame, arranged on the machine platform; First guide post, arranged below the frame along the up-down direction; First mounting plate, movably connected to the first guide post; Upper needle plate assembly, connected to the lower part of the first mounting plate and detachably connected to the first mounting plate; Second guide post, movably connected to the first mounting plate along the up-down direction and the column body penetrates through the first mounting plate, a limit ring is arranged above the second guide post, and the limit ring is used for keeping the second guide post on the first mounting plate, and the fixed seat is connected to the lower end of the second guide post; Limit block, arranged below the fixed seat, and used for limiting the descending height of the fixed seat; Driving assembly, arranged on the frame, and used for driving the first mounting plate to move up and down.

3. The PCB testing device with adjustable test pitch according to claim 2, characterized in that, A spring is further arranged at the upper end of the second guide post, the upper end of the spring is connected to the limit ring, and a stop block for abutting against the lower end of the spring is arranged on the mounting plate.

4. A PCB test device with adjustable test spacing according to claim 3, characterized in that, The column body of the first guide post penetrates through the fixed seat, and a guide sleeve is arranged at the position where the first guide post contacts the fixed seat.

5. The PCB testing device with adjustable test pitch according to claim 4, characterized in that, It further includes a guide bar, and the guide bar is arranged on the second mounting plate and the third mounting plate along the direction of the belt.

6. The PCB testing device with adjustable test pitch according to claim 2, characterized in that, The driving assembly includes: Lifting cylinder, arranged above the frame, and the output end is connected to the first mounting plate; Third guide post, arranged on the frame, and the lower end of the third guide post is connected to the first mounting plate.

7. The PCB test device with adjustable test pitch according to claim 6, characterized in that, A fourth mounting plate is arranged above the third guide post, and a buffer member is arranged on the fourth mounting plate, and the buffer member is used for slowing down the impact force when the first mounting plate descends.

8. The PCB testing device with adjustable test pitch according to claim 7, characterized in that, The buffer member includes a buffer post arranged on the fourth mounting plate and a spring arranged below the buffer post.

9. The PCB testing device with adjustable test pitch according to claim 2, wherein, Two mounting bars are arranged on the machine platform, and it further includes: Lower needle plate assembly, detachably arranged on the machine platform and located between the two mounting bars; Carrier plate, arranged on the machine platform and located between the upper needle plate assembly and the lower needle plate assembly.

10. A PCB testing device with adjustable test spacing according to claim 9, characterized in that, Two fixing bars are arranged below the first mounting plate, and two fixing members are detachably arranged above the first mounting plate. A gap is formed between the two fixing bars and the first mounting plate, the top of the upper needle plate assembly is inserted into the gap and fixed by the fixing members.

11. A PCB testing device with adjustable test spacing according to claim 10, characterized in that, The upper needle plate assembly includes: Insertion plate, movably inserted into the gap; First box body, connected to the lower part of the insertion plate; The upper needle plate is arranged below the first box body. The upper needle plate is connected to the plug board through a connecting column. The first box body is used for storing the connecting wires in the upper needle plate.

12. The PCB testing device with adjustable test pitch according to claim 9, characterized in that, A fixing block is provided on the machine table. The fixing member is detachably provided on the fixing block. An installation block is provided on the lower needle plate assembly. The fixing member is used for restricting the installation block on the fixing block, so that the lower needle plate assembly is restricted below the upper needle plate assembly.

13. A PCB test device with adjustable test spacing according to claim 12, characterized in that, The lower needle plate assembly includes: A bottom plate is movably arranged between the two installation strips. The installation block is arranged on the side surface of the bottom plate. A second box body is arranged on the bottom plate. A lower needle plate is arranged above the second box body. The second box body is used for storing the connecting wires on the lower needle plate.

14. A PCB testing device with adjustable test spacing according to claim 13, characterized in that, A connecting plate is further provided at the upper end of the second box body. One side of the lower needle plate is hinged to the connecting plate through a hinge.

15. A PCB test device with adjustable test spacing according to claim 14, characterized in that, A support plate and a support bar are provided on the bottom plate. A chute is horizontally provided on the support plate. A vertical groove is provided at one end of the chute. One end of the support bar is hinged to the lower end of the bottom plate on the side away from the hinge, and the other end is hinged to a knob. The middle section of the knob is movably arranged in the chute.

16. A PCB test device with adjustable test spacing according to claim 15, characterized in that, Barbs are further provided on the side surface of the lower needle plate on the side away from the hinge. A connecting ring for fixing the barbs is provided on the side surface of the second box body.

17. A PCB test device with adjustable test spacing according to claim 1, characterized in that, A slide rail is provided on the machine table. A slider is movably connected to the slide rail. An installation frame is provided on the slider. The carrier plate is detachably connected to the installation frame through a connecting rod.

18. A PCB test device with adjustable test spacing according to claim 17, characterized in that A push rod is further provided on the slider. A spring is provided at the lower end of the push rod, and the upper end abuts against the carrier plate. A guide rod is further provided below the carrier plate. The rod body of the guide rod is movably arranged in the installation frame.

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