A testing machine

Abstract

The present invention discloses a testing machine, comprising: a base frame; a conveying mechanism, which is driven by external power to transmit a workpiece to be detected, including a power transmission unit and upper and lower conveyor belt units; a detection channel; a detection mechanism, which performs visual detection on both sides of the workpiece to be detected through the detection channel; the power transmission unit includes a same-side transmission unit, an opposite-side transmission unit and a reversing component, the same-side transmission unit is transmission-connected to each conveyor belt unit located on the same side of the workpiece to be detected, and the opposite-side transmission unit is transmission-connected to the conveyor belt units located on different sides of the workpiece to be detected; the reversing component is arranged on any one of the conveyor belt units, and the reversing component is transmission-connected to the conveyor belt unit and the opposite-side transmission unit. By setting multiple conveyor belt units to be driven by the same external power and realizing the same transmission direction of the upper conveyor belt unit and the lower conveyor belt unit through the reversing component, the integrity of the workpiece to be detected during the transmission process is ensured.

Description

Technical Field

[0001] The present invention relates to the field of testing technology, and in particular to a testing machine. Background Art

[0002] PCBs, also known as printed circuit boards, are primarily designed for layout. The primary advantage of using PCBs is that they significantly reduce wiring and assembly errors, improving automation and increasing productivity. With the advancement of science and technology, PCBs are increasingly used, and the demands placed on them are becoming increasingly stringent. To ensure high-performance PCBs, conveyor belts are required for transport and inspection during the PCB production process.

[0003] When inspecting both sides of a PCB, the prior art discloses a device for conveying and inspecting the PCB. The device comprises an upper conveyor belt, a left conveyor belt, a right conveyor belt, and a detection structure, wherein the left and right conveyor belts are arranged horizontally, and the upper conveyor belt is arranged above the left and right conveyor belts. When the PCB is on the right conveyor belt, the detection structure inspects the top side of the PCB; when the PCB is on the left conveyor belt, another detection structure inspects the bottom side of the PCB, thereby enabling double-sided inspection of the PCB. Typically, the left and right conveyor belts are driven by the same first motor, while the upper conveyor belt is driven by a separate first motor. Because the conveyor belts are driven by different drive elements, the PCB can be damaged due to asynchronous conveying of the conveyor belts. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that the transmission belts stacked up and down are driven by different driving parts, resulting in asynchronous transmission and damage to the PCB board, thereby providing a testing machine.

[0005] A testing machine, comprising: a base frame; and further comprising:

[0006] A conveying mechanism, driven by external power to transport the workpiece to be inspected, comprises a power transmission unit and a plurality of upper conveyor belt units and lower conveyor belt units located on both sides of the workpiece to be inspected, wherein the conveyor belt units are connected to each other through the power transmission unit;

[0007] A detection channel, comprising an upper detection channel formed at an end of any one of the upper conveyor belt units, and a lower detection channel formed at an end of any one of the lower conveyor belt units;

[0008] and an inspection mechanism, comprising an upper inspection unit and a lower inspection unit respectively arranged corresponding to the upper inspection channel and the lower inspection channel, wherein the inspection unit passes through the inspection channel to perform visual inspection on both sides of the workpiece to be inspected;

[0009] The power transmission unit includes a same-side transmission unit, an opposite-side transmission unit and a reversing assembly. The same-side transmission unit is transmission-connected to each conveyor belt unit located on the same side of the workpiece to be detected, and the opposite-side transmission unit is transmission-connected to the conveyor belt units located on different sides of the workpiece to be detected; the reversing assembly is arranged on any one of the conveyor belt units, and the reversing assembly transmission-connects the conveyor belt unit and the opposite-side transmission unit.

[0010] Furthermore, it also includes a conveying anti-warping mechanism arranged on the base frame, and the conveying anti-warping mechanism includes an adjustment pressure component and a warping detection component. The adjustment pressure component has a first working state and a second working state. In the first working state, the adjustment pressure component applies a flattening force to the workpiece to be detected; in the second working state, the adjustment pressure component is acted upon by the workpiece to be detected to trigger the warping detection component.

[0011] Furthermore, the adjustment pressure assembly includes a pressure plate and a trigger rod fixedly connected thereto, the pressure plate is floatingly arranged on the base frame, and the trigger rod is driven by the pressure plate to move toward the direction close to the warping detection member;

[0012] The warping detection member is a photoelectric sensor, and the trigger rod is triggered after rising to a predetermined position.

[0013] Furthermore, the height of the photoelectric sensor is adjustable.

[0014] Furthermore, it also includes a correction mechanism, which includes a correction adjustment component and a clamping component. The correction adjustment component is movably arranged on the base frame, and the clamping component is connected to the correction adjustment component. The correction adjustment component adjusts the tension of the conveyor belt of the conveyor belt unit applied by the clamping component.

[0015] Furthermore, the deflection correction adjustment component includes a deflection correction adjustment action member and a deflection correction adjustment connecting component, the deflection correction adjustment action member acts on the deflection correction adjustment connecting component, and the deflection correction adjustment connecting component is connected to the clamping component.

[0016] Furthermore, the correction and adjustment connection assembly includes a mounting connection block and a first connecting column, the mounting connection block is provided with a strip hole, the strip hole is connected to the base frame through a fastener, and the first connecting column is passed through and fixed on the mounting connection block and connected to the clamping assembly.

[0017] Furthermore, the clamping assembly includes a clamping roller, the axis of which is arranged perpendicular to the conveying direction of the conveyor belt unit, and has an axial inner end extending above the conveyor belt and an axial outer end exposed to the conveyor belt, the axial inner end is arranged higher than the axial outer end, the axial inner end is connected to the base frame, and the axial outer end is connected to the first connecting column.

[0018] Furthermore, the same-side transmission unit and the opposite-side transmission unit are both pulley transmission components; the reversing component includes a pair of gears that mesh with each other, one of which is coaxially arranged with the pulley of the opposite-side transmission unit, and the other is coaxially arranged with the conveying shaft of the upper conveyor belt unit.

[0019] Furthermore, the base frame includes a fixed base frame and a movable base frame, the upper conveyor belt unit is arranged on the movable base frame, the first drive unit, the second drive unit, the lower conveyor belt unit, and the detection mechanism are all arranged on the fixed base frame, wherein the first drive unit drives the movable base frame to move, and the second drive unit drives the detection mechanism to move.

[0020] The technical solution of the present invention has the following advantages:

[0021] 1. The present invention provides a testing machine, comprising: a base frame; further comprising: a conveying mechanism disposed on the base frame, driven by external power to transport a workpiece to be inspected, comprising a power transmission unit and a plurality of upper and lower conveyor belt units located on both sides of the workpiece to be inspected, the conveyor belt units being transmission-connected by the power transmission unit; an inspection channel comprising an upper inspection channel formed at the end of any one of the upper conveyor belt units, and a lower inspection channel formed at the end of any one of the lower conveyor belt units; and an inspection mechanism comprising an upper inspection unit and a lower inspection unit respectively disposed corresponding to the upper and lower inspection channels, the inspection units performing visual inspection on both sides of the workpiece to be inspected through the inspection channels; the power transmission unit comprising a same-side transmission unit, a different-side transmission unit, and a reversing assembly, the same-side transmission unit being transmission-connected to the conveyor belt units located on the same side of the workpiece to be inspected, and the different-side transmission unit being transmission-connected to the conveyor belt units located on different sides of the workpiece to be inspected; the reversing assembly being disposed on any one of the conveyor belt units, the reversing assembly transmission-connecting the conveyor belt unit and the different-side transmission unit. A testing machine of this structure is provided with multiple conveyor belt units driven by the same external power and the upper conveyor belt unit and the lower conveyor belt unit are driven in the same direction by a reversing assembly, thereby achieving synchronous conveyance of the upper conveyor belt unit and the lower conveyor belt unit to ensure the integrity of the workpiece to be tested during the transmission process.

[0022] 2. The present invention provides a testing machine, further comprising a conveying anti-warping mechanism disposed on the base frame, the conveying anti-warping mechanism comprising an adjusting pressure assembly and a warping detection member, the adjusting pressure assembly having a first operating state and a second operating state. In the first operating state, the adjusting pressure assembly applies a flattening force to the workpiece to be tested; in the second operating state, the adjusting pressure assembly is acted upon by the workpiece to trigger the warping detection member. A testing machine with this structure, by being provided with the adjusting pressure assembly and the warping detection member, when the degree of warping of the workpiece to be tested is small and insufficient to cause the adjusting pressure assembly to move, the adjusting pressure assembly acts on the workpiece to flatten the workpiece, thereby entering the first operating state. When the degree of warping of the workpiece to be tested is excessive and sufficient to cause the adjusting pressure assembly to move, the workpiece acts on the adjusting pressure assembly to cause its movement, triggering the warping detection member and entering the second operating state. Subsequently, the workpiece to be tested is manually flattened to prevent damage to the workpiece due to instantaneous force.

[0023] 3. In a testing machine provided by the present invention, the photoelectric sensor is height-adjustable. This testing machine structure allows the photoelectric sensor to be adjusted in height according to the thickness of the workpiece to be tested, thereby achieving anti-warping treatment for different types of workpieces to be tested.

[0024] 4. The present invention provides a testing machine that further includes a deflection correction mechanism, which includes a deflection correction adjustment component and a clamping component. The deflection correction adjustment component is movably mounted on the base frame, and the clamping component is connected to the deflection correction adjustment component. The deflection correction adjustment component adjusts the tension of the conveyor belt applied by the clamping component to the conveyor belt unit. A testing machine with this structure is provided with a deflection correction mechanism, wherein the clamping component acts on the loose side of the conveyor belt to clamp it, so that the tension obtained by the clamping component on the loose side of the conveyor belt is greater than the tension on the other side. Since the conveyor belt moves from a position with high tension to a position with low tension, the loose side of the conveyor belt moves toward the other side, thereby achieving deflection correction of the conveyor belt.

[0025] 5. The present invention provides a testing machine, wherein the clamping assembly includes a clamping roller, the axis of which is arranged perpendicular to the conveying direction of the conveyor belt unit, and the clamping roller has an axial inner end extending above the conveyor belt and an axial outer end exposed from the conveyor belt, the axial inner end being arranged higher than the axial outer end, the axial inner end being connected to the base frame, and the axial outer end being connected to the first connecting column. In a testing machine with this structure, by arranging the axial inner end of the clamping roller higher than the axial outer end of the clamping roller, the clamping assembly applies force toward the other side of the conveyor belt when clamping the conveyor belt, thereby preventing the loose side of the conveyor belt from further deflecting.

[0026] 6. The present invention provides a testing machine, wherein the base frame includes a fixed base frame and a movable base frame, the upper conveyor belt unit is disposed on the movable base frame, and the first drive unit, the second drive unit, the lower conveyor belt unit, and the detection mechanism are all disposed on the fixed base frame, wherein the first drive unit drives the movable base frame to move, and the second drive unit drives the detection mechanism to move. A testing machine with this structure is provided with a first drive unit to adjust a first distance between the upper conveyor belt unit and the lower conveyor belt unit, and a second drive unit to adjust a second distance between the detection mechanism and the lower conveyor belt unit, so that both the first distance and the second distance are adapted to the thickness of the workpiece to be inspected, thereby enabling the conveyance and inspection of different types of workpieces to be inspected. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 A schematic structural diagram of a testing machine provided in an embodiment of the present invention;

[0029] Figure 2 for Figure 1 The conveying mechanism shown does not show a partial structural diagram of the base frame;

[0030] Figure 3 for Figure 1 The conveying mechanism shown does not show part of the base frame and is a schematic diagram of the structure after horizontal rotation;

[0031] Figure 4 for Figure 2 The structural diagram of the opposite side transmission unit is shown;

[0032] Figure 5 for Figure 3 A partial enlarged view of the transmission unit on the same side is shown (the image has been rotated 90° to the right);

[0033] Figure 6 for Figure 2 The structural diagram of the conveying anti-warping mechanism shown;

[0034] Figure 7 for Figure 2 The structural diagram of the correction mechanism shown in FIG.

[0035] Figure 8 for Figure 7 A partial enlarged view of the correction mechanism shown;

[0036] Description of reference numerals:

[0037] 111-upper light source assembly, 112-upper visual detection assembly, 121-lower light source assembly, 122-lower visual detection assembly, 13-second motor;

[0038] 2-PCB board;

[0039] 31-horizontal fixed base, 311-third mounting plate, 312-arc-shaped hole, 313-first slide, 32-vertical fixed base, 33-movable base, 331-fourth mounting plate, 3311-second slide;

[0040] 41 - first motor, 42 - first connecting unit, 421 - lead screw, 422 - first connecting plate, 423 - first mounting plate, 424 - adjusting connecting column, 425 - load-bearing connecting column, 426 - T-shaped connector, 431 - second mounting plate, 432 - guide shaft, 433 - first linear bearing, 434 - slider, 435 - mounting base;

[0041] 511-upper conveyor belt, 512-upper main conveyor shaft, 521-first lower conveyor belt, 522-first lower main conveyor shaft, 531-second lower conveyor belt, 532-second lower main conveyor shaft, 541-third lower conveyor belt, 542-third lower main conveyor shaft;

[0042] 61- third motor, 62- fourth pulley;

[0043] 711-first pulley transmission assembly, 7111-first pulley, 7112-first transmission belt, 712-second pulley transmission assembly, 7121-second transmission belt, 7122-second pulley, 7123-first guide pulley, 721-third pulley transmission assembly, 7211-third transmission belt, 7212-second guide pulley, 7213-connecting shaft, 7214-third pulley;

[0044] 81-first gear, 82-second gear;

[0045] 91-first tensioning assembly, 911-first tensioning wheel, 912-first tensioning connector, 913-first limiting member, 92-second tensioning assembly, 921-second tensioning wheel, 922-second tensioning connector, 9221-second strip hole, 923-second limiting member, 93-third tensioning assembly, 931-third tensioning wheel, 9321-connecting portion, 93211-third strip hole, 9322-limiting portion, 941-fourth tensioning wheel, 942-fourth tensioning connector, 9421-fourth strip hole, 943-fourth limiting member;

[0046] 10-negative pressure pump;

[0047] 131-photoelectric sensor, 1311-boss;

[0048] 1411 - first vertical end arm, 1412 - second horizontal end arm, 1413 - third horizontal end arm, 1421 - second vertical end arm, 1422 - first horizontal end arm, 14221 - first through hole, 143 - base;

[0049] 15-L type pressure plate,

[0050] 161 - trigger rod, 162 - first linear bearing, 163 - first retaining spring, 164 - second retaining spring, 165 - first connecting block;

[0051] 171 - pressing roller, 172 - pressing roller shaft, 1721 - axial outer end, 1722 - axial inner end;

[0052] 181-first screw, 182-fixing plate;

[0053] 19-installation connection block, 191-sixth strip hole, 192-first connection column;

[0054] 20-Second connecting column. DETAILED DESCRIPTION

[0055] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0056] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0057] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0058] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0059] Example

[0060] like Figures 1 to 8 A testing machine shown includes a base frame, and a conveying mechanism, a detection channel, a detection mechanism, a conveying anti-warping mechanism and a correction mechanism arranged on the base frame.

[0061] The conveying mechanism is driven by external power to transmit the workpiece to be inspected, and specifically includes a power transmission unit, several upper conveyor belt units and lower conveyor belt units located on both sides of the workpiece to be inspected, an adsorption unit and a tensioning assembly. The conveyor belt units are connected through the power transmission unit, and the conveyor belt unit includes a conveyor shaft and a conveyor belt arranged on the conveyor shaft.

[0062] The detection channel includes an upper detection channel formed at the end of any upper conveyor belt unit and a lower detection channel formed at the end of any lower conveyor belt unit; the detection mechanism includes an upper detection unit and a lower detection unit respectively arranged corresponding to the upper detection channel and the lower detection channel, and the detection unit performs visual inspection on both sides of the workpiece to be inspected through the detection channel.

[0063] The conveyor warpage prevention mechanism is used to flatten workpieces with minimal warpage. Alternatively, it issues an alarm, such as an audible warning, to instruct the operator to manually flatten excessively warped workpieces. The deflection correction mechanism is used to correct the conveyor belt if it deviates. The workpiece to be inspected can be a PCB 2 or other workpiece to be inspected.

[0064] By setting up multiple conveyor belt units driven by the same external power and using a reversing component to achieve the same transmission direction of the upper conveyor belt unit and the lower conveyor belt unit, synchronous transportation of the upper conveyor belt unit and the lower conveyor belt unit is achieved to ensure the integrity of the PCB board 2 during the transmission process.

[0065] Specific reference Figure 2The upper conveyor belt unit is stacked on the lower conveyor belt unit and can move closer to or away from the lower conveyor belt unit. The power transmission unit is directly or indirectly connected to the conveyor shaft and external power, and specifically includes a same-side transmission unit, an opposite-side transmission unit, and a reversing assembly. The same-side transmission unit is connected to the conveyor shaft between the conveyor belt units located on the same side of the PCB board 2, and the opposite-side transmission unit is connected to the conveyor shaft between the conveyor belt units located on different sides of the PCB board 2. The reversing assembly is provided on any one of the conveyor belt units, and the reversing assembly is connected to the conveyor belt unit and the opposite-side transmission unit to ensure that the conveyor belt units located on different sides of the PCB board 2 convey the PCB board 2 in the same direction. The suction unit is used to suction the PCB board 2. The tensioning assembly tensions the transmission belts of the same-side transmission unit and the opposite-side transmission unit. In this embodiment, the same-side transmission unit and the opposite-side transmission unit are both pulley transmission assemblies. Specifically, the pulley transmission assembly includes a pulley fixed to the shaft and a transmission belt connecting the multiple pulleys.

[0066] The conveyor shaft of each conveyor belt unit includes a main conveyor shaft and a secondary conveyor shaft fixed to the base frame. The conveyor belt is mounted on the main conveyor shaft and the secondary conveyor shaft. The main conveyor shaft is directly or indirectly connected to an external power source via a same-side transmission unit or a different-side transmission unit to realize the transmission of each conveyor belt. It should be noted that at least the upper conveyor belt unit is provided with a suction unit for adsorbing the PCB board 2. The lower conveyor belt unit may or may not be provided with a suction unit. The suction unit can be configured to include a negative pressure hole provided on the surface of the conveyor belt and a negative pressure pump 10 connected to the negative pressure hole. The negative pressure pump 10 draws air to provide suction to adsorb the PCB board 2 on the conveyor belt.

[0067] like Figure 1 As shown, the base frame in this embodiment includes a fixed base frame and a movable base frame 33, wherein the fixed base frame includes a horizontal fixed base frame 31 and a vertical fixed base frame 32. The vertical fixed base frame 32 is perpendicularly mounted on one side of the horizontal fixed base frame 31 where the upper conveyor belt unit is mounted. The movable base frame 33 is connected to a first drive connection unit mounted on the vertical fixed base frame 32, which drives the movable base frame 33 to move closer to or away from the horizontal fixed base frame 31. In this embodiment, the upper conveyor belt unit is mounted on the movable base frame 33, and the lower conveyor belt unit is mounted on the horizontal fixed base frame 31.

[0068] See also Figure 2, wherein the first drive connection unit in this embodiment includes a first drive unit, a first connection unit 42 and an auxiliary connection unit. The first drive unit can be a first motor 41. The first motor 41 is provided on a mounting base 435, and the mounting base 435 is fixedly connected to the vertical fixed base 32; the first connection unit 42 connects the first motor 41 and the movable base 33; the auxiliary connection unit floats and connects the movable base 33 and the horizontal fixed base 31, and the first connection unit 42 drives the movable base 33 to move along the auxiliary connection unit. By providing a first drive connection unit to adjust the distance between the upper conveyor belt unit and the lower conveyor belt unit, the distance is adapted to the thickness of the PCB board 2, thereby realizing the transportation of different types of PCB boards 2.

[0069] Specific reference Figure 2 and Figure 3 In this embodiment, the first connecting unit 42 includes a screw 421, a screw nut, a first connecting plate 422, a first mounting plate 423, an adjusting connecting column 424, a load-bearing connecting column 425 and a T-shaped connecting piece 426. The screw 421 is connected to the output end of the first motor 41, and the screw nut is threadedly connected to the screw 421 and fixedly connected to the first connecting plate 422; the first end of the adjusting connecting column 424 is passed through a U-shaped hole on the first mounting plate 423 fixedly provided on one side of the first connecting plate 422 and is fixedly connected to the first mounting plate 423 by a fastener, and the second end of the adjusting connecting column 424 is fixedly provided on the T-shaped connecting piece 426, wherein the two ends of the T-shaped connecting piece 426 are fixedly connected to the movable base frame 33, and the function of the adjusting connecting column 424 is to adjust its The tilt angle is to ensure that the conveyor belt unit maintains horizontal transportation; the first end of the load-bearing connecting column 425 is passed through the U-shaped hole on the first mounting plate 423 fixed on the other side of the first connecting plate 422 and is fixed to the first mounting plate 423 by a fastener, and the second end of the load-bearing connecting column 425 is fixed on the T-shaped connecting piece 426, wherein the vertical part of the T-shaped connecting piece 426 is located between the adjusting connecting column 424 and the load-bearing connecting column 425. The function of the load-bearing connecting column 425 is to bear most of the weight of the first drive connecting unit and usually does not require adjustment.

[0070] Specific reference Figure 2 In this embodiment, the auxiliary connection unit includes a second mounting plate 431, a guide shaft 432, a first linear bearing 433, and a slider 434. The second mounting plate 431 is fixed to the horizontal fixed base 31, the guide shaft 432 is fixed to the second mounting plate 431, and the slider 434 is floatingly connected to the guide shaft 432 via the first linear bearing 433. The slider 434 is fixed to the movable base 33. The auxiliary connection unit ensures the stability of the movable base 33.

[0071] See also Figure 3In this embodiment, only one upper conveyor belt unit is provided, and the upper conveyor belt unit is provided on the movable base frame 33. Three lower conveyor belt units are provided along the same plane and are all provided on the horizontal fixed base frame 31. The rotation direction of the upper conveyor belt 511 is opposite to that of the lower conveyor belt to ensure that the conveying directions of the conveyor belt units located on different sides of the PCB board 2 are the same.

[0072] For the convenience of description, the main conveying shaft and conveying belt of the upper conveying belt unit are referred to as the upper main conveying shaft 512 and the upper conveying belt 511 in sequence. Figure 3 From left to right in the middle are the first lower conveyor belt unit, the second lower conveyor belt unit and the third lower conveyor belt unit. Correspondingly, the main conveying shaft and conveyor belt of the first lower conveyor belt unit are the first lower main conveying shaft 522 and the first lower conveyor belt 521 respectively, the main conveying shaft and conveyor belt of the second lower conveyor belt unit are the second lower main conveying shaft 532 and the second lower conveyor belt 532 respectively, and the main conveying shaft and conveyor belt of the third lower conveyor belt unit are the third lower main conveying shaft 542 and the third lower main conveyor belt 541 respectively.

[0073] By providing a fixed base and a movable base 33, when the PCB board 2 is located on one of the lower conveyor belt units, the exposed upper surface of the PCB board 2 can be subjected to processing such as inspection. When processing such as inspection is required for the lower surface of the PCB board 2 in contact with the lower conveyor belt unit, the upper conveyor belt unit absorbs the PCB board 2 for transportation and exposes the lower surface for processing such as inspection, thereby facilitating processing such as inspection on both sides of the PCB board 2.

[0074] like Figure 1 and Figure 2As shown, the upper detection unit includes an upper light source assembly 111 and an upper visual detection assembly 112, and the lower detection unit includes a lower light source assembly 121 and a lower visual detection assembly 122. The upper detection unit is fixed on a second drive unit provided on a vertical base frame, and the lower detection unit is fixed on a horizontal fixed base frame 31. The second drive unit drives the upper detection unit to move closer to or away from the lower conveyor belt unit. Specifically, the second drive unit can be set to be a second motor 13. The upper light source assembly 111 and the lower light source assembly 121 in this embodiment are respectively irradiated on the two side surfaces of the PCB board through the lower detection channel of the second lower conveyor belt unit and the upper detection channel of the upper conveyor belt unit, and the corresponding upper visual detection assembly 112 and the lower visual detection assembly 122 respectively perform visual inspection on the two side surfaces of the PCB board 2. Specifically, the upper visual detection assembly 112 and the lower visual detection assembly 122 can be set to include an upper CCD visual camera and a lower CCD visual camera, respectively. There is a first distance between the first lower conveyor belt unit and the second lower conveyor belt unit, and the first distance allows the lower light source assembly 121 to illuminate the upper detection channel, so as to allow the lower visual detection assembly 122 to perform visual analysis and detection on the PCB board 2 through the lower light source assembly 121.

[0075] By providing a first driving unit to adjust the first distance between the upper conveyor belt unit and the lower conveyor belt unit and a second driving unit to adjust the second distance between the detection mechanism and the lower conveyor belt unit, the first distance and the second distance are both adapted to the thickness of the PCB board 2, thereby realizing the transportation and detection of different types of PCB boards 2.

[0076] See also Figure 3 The external power in this embodiment includes a third motor 61 and a fourth pulley 62, wherein the third motor 61 is fixed on a third mounting plate 311 provided on a horizontal fixed base 31 and is located below the lower conveyor belt unit, and the fourth pulley 62 is sleeved and fixed on the output shaft of the third motor 61.

[0077] See also Figure 3 The same-side transmission unit in this embodiment includes a first pulley transmission assembly 711 and a second pulley transmission assembly 712, wherein the first pulley transmission assembly 711 transmits and connects the conveying shafts and the fourth pulley 62 of the two lower conveyor belt units, and the second pulley transmission assembly 712 transmits and connects the conveying shaft and the fourth pulley 62 of the other lower conveyor belt unit.

[0078] See Figure 5In this embodiment, the first pulley transmission assembly 711 includes a first transmission belt 7112 and a first pulley 7111 respectively provided on the first lower main conveying shaft 522 and the second lower main conveying shaft 532, and the first transmission belt 7112 is sleeved and connected to the first pulley 7111 and the fourth pulley 62; in this embodiment, the second pulley transmission assembly 712 includes a second transmission belt 7121, a first guide wheel 7123 provided on the third mounting plate 311 and a second pulley 7122 provided on the third lower main conveying shaft 542, and the second transmission belt 7121 is sleeved and connected to the second pulley 7122, the first guide wheel 7123 and the fourth pulley 62. Of course, the transmission unit on the same side can also be configured to include a pulley transmission assembly, which transmits and connects three pulleys on the main conveying shaft of the lower conveyor belt unit and the fourth pulley 62; or the transmission unit on the same side can also be configured to include three pulley transmission assemblies, which transmit and connect the pulleys on the main conveying shaft of the three lower conveyor belt units and the fourth pulley 62.

[0079] See also Figure 2 and Figure 4 The opposite-side transmission unit in this embodiment includes a third pulley transmission assembly 721 that transmits and connects the conveyor shaft and the reversing assembly of the lower conveyor belt unit. Specifically, the third pulley transmission assembly 721 includes a third transmission belt 7211, a second guide pulley 7212, a connecting shaft 7213, and two third pulleys 7214. One of the third pulleys 7214 is disposed on the end of the first lower main conveyor shaft 522 that is not provided with the first pulley 7111, and the other third pulley 7214 is disposed on the connecting shaft 7213 connected to the movable base frame 33. The second guide pulley 7212 is disposed on the fourth mounting plate 331 provided on the movable base frame 33. The third transmission belt 7211 is sleeved and connected to the third pulley 7214 and the second guide pulley 7212.

[0080] The reversing assembly in this embodiment includes a pair of gears meshing with each other, namely a first gear 81 and a second gear 82. The first gear 81 is coaxially arranged with the pulley of the opposite side transmission unit, and the second gear 82 is coaxially arranged with one of the conveying shafts of the upper conveyor belt unit. Figure 4 , wherein the first gear 81 is sleeved on the connecting shaft 7213 , and the second gear 82 is sleeved on the upper main conveying shaft 512 .

[0081] like Figures 3 to 5As shown, the tensioning assembly in this embodiment includes a first tensioning assembly 91, a second tensioning assembly 92, a third tensioning assembly 93, and a fourth tensioning assembly. The first tensioning assembly 91 and the second tensioning assembly 92 both tension the first transmission belt 7112, the third tensioning assembly 93 tensions the second transmission belt 7121, and the fourth tensioning assembly tensions the third transmission belt 7211. By providing the tensioning assemblies, the tensioning force of the transmission belt is adjusted to prevent slippage, thereby ensuring smooth operation of the transmission belt.

[0082] Specific reference Figure 5 The first tensioning assembly 91 includes a first tensioning wheel 911, a first tensioning connector 912 and a first limit member 913. The first tensioning wheel 911 is rotatably arranged on the first tensioning connector 912 and abuts against the first transmission belt 7112 and is located between the first lower main conveying shaft 522 and the output shaft of the third motor 61. The first tensioning connector 912 is connected to the third mounting plate 311 and is fixed in the arc hole 312 provided on the third mounting plate 311 by a fastener. The first limit member 913 is provided on the side of the third mounting plate 311 to limit the movement of the first tensioning connector 912 toward the first limit member 913.

[0083] Specific reference Figure 5 In this embodiment, the second tensioning assembly 92 includes a second tensioning wheel 921, a second tensioning connecting piece 922 and a second limiting piece 923. The second tensioning wheel 921 is rotatably arranged on the second tensioning connecting piece 922 and abuts against the first transmission belt 7112 and is located between the second lower main conveying shaft 532 and the output shaft of the third motor 61. A second strip hole 9221 is provided on the second tensioning connecting piece 922 and is arranged in the first slide groove 313 on the third mounting plate 311. The second strip hole 9221 on the second tensioning connecting piece 922 is fixed to the third mounting plate 311 by a fastener. The second limiting piece 923 is provided on the side of the third mounting plate 311 to limit the movement of the second tensioning connecting piece 922 toward the second limiting piece 923.

[0084] Specific reference Figure 5 The third tensioning assembly 93 in this embodiment includes a third tensioning wheel 931 and a third tensioning connecting piece. The third tensioning wheel 931 is rotatably arranged on the third tensioning connecting piece and abuts against the second transmission belt 7121. The third tensioning connecting piece is an L-shaped structure. The L-shaped structure includes a connecting portion 9321 and a limiting portion 9322. A third strip hole 93211 is provided on the connecting portion 9321 and the third strip hole 93211 is fixed to the third mounting plate 311 by a fastener. The side of the third mounting plate 311 limits the limiting portion 9322 to move toward the direction of the third mounting plate 311.

[0085] Specific reference Figure 4The fourth tensioning assembly in this embodiment includes a fourth tensioning wheel 941, a fourth tensioning connector 942 and a fourth limiting member 943. The fourth tensioning wheel 941 is rotatably arranged on the fourth tensioning connector 942 and abuts against the third transmission belt 7211. The fourth tensioning connector 942 is provided with a fourth strip hole 9421 and is arranged in the second slide groove 3311 on the fourth mounting plate 331. The fourth strip hole 9421 on the fourth tensioning connector 942 is fixed to the fourth mounting plate 331 by a fastener. The fourth limiting member 943 is provided on the side of the fourth mounting plate 331 to limit the movement of the fourth tensioning connector 942 toward the fourth limiting member 943. By providing the fourth tensioning assembly, when the movable base 33 moves in the direction away from the horizontal fixed base 31, that is, when Figure 4 When the third transmission belt 7211 moves upward, the first length of the third transmission belt 7211 between the connecting shaft 7213 and the second guide wheel 7212 will increase. At this time, the second length of the third transmission belt 7211 on the connecting shaft 7213 and the first lower main conveying shaft 522 will appropriately decrease by itself, mainly reducing the contact length between the fourth tensioning wheel 941 and the third transmission belt 7211, so that in the actual working process, when the movable base 33 moves along Figure 4 When moving upward, the moving distance of the fourth tensioning wheel 941 is adjusted to be much smaller than the moving distance of the movable base frame 33. Of course, the fourth tensioning wheel 941 may not be moved, and the specific adjustment may be made according to the working conditions.

[0086] When the third motor 61 drives the output shaft to rotate, the main conveying shafts of the three lower conveyor belt units are driven to rotate through the transmission unit on the same side, and the rotation directions of the three are consistent to achieve the same rotation direction of the conveyor belts of the lower conveyor belt units; the first lower main conveying shaft 522 drives the connecting shaft 7213 to rotate through the transmission unit on the opposite side so that the rotation direction of the first lower main conveying shaft 522 is consistent with the rotation direction of the connecting shaft 7213. Since the connecting shaft 7213 and the upper main conveying shaft 512 are meshed and connected by a pair of gears, the upper main conveying shaft 512 and the first lower main conveying shaft 522 are opposite, that is, the rotation direction of the upper conveyor belt 511 is opposite to the rotation direction of the lower conveyor belt, thereby achieving the same-direction transmission of the PCB board 2 located between the upper conveyor belt 511 and the lower conveyor belt, that is, the conveying direction of the PCB board 2 conveyed by the upper conveyor belt unit is the same as the conveying direction of the PCB board 2 conveyed by the lower conveyor belt unit.

[0087] The conveying anti-warping mechanism in this embodiment includes an adjustable pressure assembly and a warp detection element. The adjustable pressure assembly has a first operating state and a second operating state. In the first operating state, the adjustable pressure assembly applies a flattening force to the PCB board 2 to flatten the PCB board 2. In the second operating state, the adjustable pressure assembly, acting upon the PCB board 2, triggers the warp detection element. The tester issues an indication, such as an alarm, to inform the operator, who then checks the corresponding PCB board 2 to determine the degree of warpage. Specifically, the warp detection element can be a photoelectric sensor 131.

[0088] In this embodiment, the pressure adjustment assembly includes an installation adjustment assembly, a pressure plate, and a pressure plate connecting assembly, wherein the photoelectric sensor 131 is installed on the base 143 in an adjustable height by the installation adjustment assembly, and the base 143 is fixed on the movable base frame 33. Figure 6 The mounting and adjustment assembly in this embodiment includes a U-shaped mounting member, an L-shaped mounting member, and a base 143. The first vertical end arm 1411 of the U-shaped mounting member and the second vertical end arm 1421 of the L-shaped mounting member are each provided with a first strip hole and secured by a fastener. The first horizontal end arm 1422 of the L-shaped mounting member is provided with a first through hole 14221. The fastener is threadedly connected to the first through hole 14221 and abuts against the second horizontal end arm 1412 of the U-shaped mounting member. The base 143 is fixed to the base frame. The third horizontal end arm 1413 of the U-shaped mounting member is provided with a fifth strip hole and secured to the base 143 by a fastener. The mounting and adjustment assembly allows the distance between the photoelectric sensor 131 and the pressure plate to be adjusted to prevent warping of PCBs 2 of varying thicknesses.

[0089] In this embodiment, the pressure plate connecting assembly is fixedly connected to the pressure plate and movably connected to the base 143 so as to be floatingly disposed on the movable base frame 33. The base 143 restricts the pressure plate connecting assembly from moving away from the photoelectric sensor 131. The pressure plate is an L-shaped pressure plate 15, wherein the bottom arm of the L-shaped pressure plate 15 flattens the PCB board 2.

[0090] See Figure 6The pressure plate connection assembly in this embodiment includes a first connection block 165, a trigger rod 161, a first linear bearing 162, and two clamping members. The clamping member can specifically be a retaining spring. In this embodiment, the side arm of the L-shaped pressure plate 15 is fixedly connected to the side of the first connection block 165 by a fastener. The first linear bearing 162 is inserted into the base 143. The trigger rod 161 is inserted into the first linear bearing 162, and one end of the trigger rod 161 is fixed to the first connection block 165. The first retaining spring 163 is clamped on the first linear bearing 162 and is located on the side of the base 143 close to the photoelectric sensor 131. The second retaining spring 164 is clamped on the trigger rod 161 and is located on the side of the first linear bearing 162 close to the photoelectric sensor 131. The trigger rod 161 is driven by the pressure plate to move toward the photoelectric sensor 131. When the trigger rod 161 rises to a predetermined position, it triggers the photoelectric sensor 131. It should be noted that the predetermined position is the position between the two bosses 1311 of the photoelectric sensor 131 .

[0091] By providing a retaining spring, when the PCB board 2 with a large degree of warping is not affected, the retaining member abuts against the base 143 and the first linear bearing 162 respectively to limit the movement of the first linear bearing 162 and the trigger rod 161 in a direction away from the photoelectric sensor 131 to achieve a flattening effect on the PCB board 2 with a small degree of warping, and facilitates installation and saves manufacturing costs.

[0092] The working process of the conveying anti-warping mechanism is as follows: before it starts working, the installation position of the photoelectric sensor 131, the locking position of the first retaining spring 163 on the first linear bearing 162, and the locking position of the second retaining spring 164 on the trigger lever 161 are first adjusted. At this time, the first retaining spring 163 on the first linear bearing 162 abuts against the base 143, and the second retaining spring 164 on the trigger lever 161 abuts against the first linear bearing 162. When the warping degree of the PCB board 2 is small and there is a gap with the L-shaped pressure plate 15 and no contact is made, the PCB board 2 does not need to be flattened. When the warping degree of the PCB board 2 is small and it contacts the L-shaped pressure plate 15, the pressure adjustment component is in the first working state, at which time the L-shaped pressure plate 15 will apply a force on the PCB board 2 to flatten the PCB board 2. When the warping degree of the PCB board 2 is too large and it contacts the L-shaped pressure plate 15, the pressure adjustment component is in the second working state, at which time the PCB board 2 will apply a force on the L-shaped pressure plate 15, so that the L-shaped pressure plate 15 is flattened. The plate 15 drives the trigger rod 161 to move toward the direction close to the photoelectric sensor 131 and move it to a predetermined position. At this time, the photoelectric sensor 131 is triggered, and the operator knows that the warping of the PCB board 2 is too large. Then the operator will manually flatten the PCB board 2 and manually move the first linear bearing 162 and the trigger rod 161 toward the direction away from the photoelectric sensor 131 until the first retaining spring 163 on the first linear bearing 162 abuts against the base 143 and the second retaining spring 164 on the trigger rod 161 abuts against the first linear bearing 162.

[0093] By providing a warping detection member and an adjustment pressure assembly, when the degree of warping of the PCB board 2 is small and insufficient to cause the adjustment pressure assembly to move, the adjustment pressure assembly acts on the PCB board 2 to flatten the PCB board 2 and enters a first working state. When the degree of warping of the PCB board 2 is excessive and sufficient to cause the adjustment pressure assembly to move, the PCB board 2 acts on the adjustment pressure assembly to move it to the detection point of the warping detection member and enters a second working state. After the warping detection member is triggered, the PCB board 2 is manually flattened to prevent damage to the PCB board 2 due to instantaneous force. It should be noted that the conveying anti-warping mechanism can be located near the location of a rotating member, such as a conveying shaft. Only when an indication message, such as an alarm, is issued does the operator need to manually flatten the PCB board 2 near the location of the rotating member. This reduces the need for the operator to flatten the PCB board 2 at the location of the rotating member, thereby ensuring the operator's operational safety.

[0094] The deflection correction mechanism in this embodiment includes a deflection correction adjustment component and a pressing component. The deflection correction adjustment component is movably arranged on the movable base frame 33. The pressing component is connected to the deflection correction adjustment component. The deflection correction adjustment component adjusts the tension of the pressing component on the conveyor belt. Figure 7 As shown, in this embodiment, two deviation-correcting mechanisms are symmetrically arranged.

[0095] like Figure 8 As shown, the clamping assembly in this embodiment includes a clamping roller 171 and a clamping roller shaft 172. The clamping roller 171 is rotatably mounted on the clamping roller shaft 172. The axis of the clamping roller 171 is perpendicular to the conveying direction of the conveyor belt unit. The clamping roller 171 has an axial inner end 1722 extending above the conveyor belt and an axial outer end 1721 exposed from the conveyor belt. The axial inner end 1722 is higher than the axial outer end 1721. The axial inner end 1722 is connected to the movable base 33 via the second connecting column 20. The movable base 33 and the second connecting column 20 can be integrally or separately configured.

[0096] The deflection correction adjustment component in this embodiment includes a deflection correction adjustment member and a deflection correction adjustment connecting component. The deflection correction adjustment member acts on the deflection correction adjustment connecting component, and the deflection correction adjustment component is connected to the pressing component. Figure 8 As shown, the deflection correction member in this embodiment is a first screw 181, which is threadedly connected to a fixing plate 182, and the end of the first screw 181 abuts against the deflection correction connection assembly, wherein the fixing plate is fixed to the movable base frame 33 via fasteners. By adjusting the first screw 181, the pressing assembly is adjusted to press against the conveyor belt, thereby achieving deflection correction, avoiding the need for manual operation to correct the conveyor belt deflection and improving the adjustment accuracy of the deflection correction.

[0097] like Figure 8 As shown, the corrective connection assembly in this embodiment includes a mounting block 19 and a first connecting post 192. The first connecting post 192 is disposed between the mounting block 19 and an axially outer end 1721 of the pressure roller 172, and the three are connected by fasteners. The mounting block 19 and the first connecting post 192 are integrally or separately provided, and both the axially outer end 1721 and the axially inner end 1722 of the pressure roller 172 are rotatable.

[0098] like Figure 8 As shown, the mounting connection block 19 in this embodiment is provided with a sixth strip hole 191, which is connected to the movable base frame 33 through a fastener; the first connecting column 192 is passed through and fixed on the mounting block and connected to the clamping assembly.

[0099] By providing a deviation correction mechanism, in which a clamping assembly acts on the loose side of the conveyor belt to tighten it, the tension obtained by the clamping assembly on the loose side of the conveyor belt is greater than the tension on the other side. Since the conveyor belt moves from a position with high tension to a position with low tension, the loose side of the conveyor belt moves toward the other side, thereby achieving deviation correction of the conveyor belt; and by setting the axial inner end 1722 of the clamping roller 171 higher than the axial outer end 1721 of the clamping roller 171, the clamping assembly applies a force to the conveyor belt toward the other side when clamping the conveyor belt, thereby preventing the loose side of the conveyor belt from continuing to deviate.

[0100] The method of using the correction mechanism is to rotate the first screw 181 to drive the installation connection block 19 to move toward the direction close to the conveyor belt, thereby driving the clamping roller 172 to press down the loose side of the conveyor belt, so that the tension on the loose side of the conveyor belt is greater than the other side, so that the loose side of the conveyor belt moves toward the other side to achieve the correction of the conveyor belt.

[0101] The working process of the testing machine of the present invention is as follows:

[0102] First, the PCB board 2 is first transferred by the first lower conveyor belt unit; then, the PCB board 2 previously located on the first lower conveyor belt unit is adsorbed and transferred by the upper conveyor belt unit;

[0103] After the conveying anti-warping mechanism works, the lower detection unit detects the PCB board 2;

[0104] Next, the second lower conveyor belt unit absorbs and transfers the PCB board 2 previously located on the upper conveyor belt unit, and the upper detection unit detects the PCB board 2. During the transmission process of the two conveyor belt units, the suction force of the adsorption unit on the upper conveyor belt unit is used to adsorb the PCB board from the first lower conveyor belt unit to the upper conveyor belt unit.

[0105] Afterwards, the PCB board is transferred to the third lower conveyor unit via the second lower conveyor unit, and the third lower conveyor unit outputs the inspected PCB board 2, thus completing the transfer and inspection of the PCB board 2. It should be noted that when the lower conveyor unit is provided with an adsorption unit, the lower conveyor unit also adsorbs and transfers the PCB board 2. During the transfer process, the following conditions must be met: the suction force of the adsorption unit on the upper conveyor unit must overcome the suction force of the adsorption unit on the first lower conveyor unit and the weight of the PCB board 2 itself; the suction force of the adsorption unit on the second lower conveyor unit and the weight of the PCB board 2 itself must overcome the suction force of the upper conveyor unit; the deviation correction mechanism will only correct the deviation when the conveyor belt deviates before the testing machine can operate; the distance between the upper conveyor unit and the lower conveyor unit, and the distance between the detection mechanism and the conveyor unit, are adjusted according to the thickness of the PCB board 2 before transfer and testing.

[0106] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A testing machine, comprising a base frame; characterized in that: Also included is a device disposed on the base frame: A conveying mechanism, driven by external power to transmit the workpiece to be inspected, comprises a power transmission unit and a plurality of upper conveyor belt units and lower conveyor belt units located on both sides of the workpiece to be inspected, wherein the conveyor belt units are connected to each other through the power transmission unit; A detection channel, comprising an upper detection channel formed at an end of any of the upper conveyor belt units, and a lower detection channel formed at an end of any of the lower conveyor belt units; and a detection mechanism, comprising an upper detection unit and a lower detection unit respectively arranged corresponding to the upper detection channel and the lower detection channel, wherein the detection unit passes through the detection channel to perform visual detection on both sides of the workpiece to be detected; The power transmission unit comprises a same-side transmission unit, an opposite-side transmission unit and a reversing assembly, wherein the same-side transmission unit is transmission-connected to each conveyor belt unit located on the same side of the workpiece to be detected, and the opposite-side transmission unit is transmission-connected to the conveyor belt units located on different sides of the workpiece to be detected; the reversing assembly is arranged on any one of the conveyor belt units, and the reversing assembly is transmission-connected to the conveyor belt unit and the opposite-side transmission unit; It also includes a conveying anti-warping mechanism disposed on the base frame, the conveying anti-warping mechanism includes an adjusting pressure component and a warping detection component, the adjusting pressure component has a first working state and a second working state, in the first working state, the adjusting pressure component applies a flattening force to the workpiece to be detected; In the second working state, the adjusting pressure component is acted upon by the workpiece to be detected to trigger the warping detection component.

2. A testing machine according to claim 1, characterized in that: The adjusting pressure assembly comprises a pressing plate and a trigger rod fixedly connected thereto, wherein the pressing plate is floatingly arranged on the base frame, and the trigger rod is driven by the pressing plate to move toward a direction close to the warping detection member; The warping detection member is a photoelectric sensor, and the photoelectric sensor is triggered after the trigger rod rises to a predetermined position.

3. A testing machine according to claim 2, characterized in that: The photoelectric sensor can be arranged with an adjustable height.

4. A testing machine according to claim 3, characterized in that: It also includes a correcting mechanism, which includes a correcting adjustment component and a clamping component. The correcting adjustment component is movably arranged on the base frame, and the clamping component is connected to the correcting adjustment component. The correcting adjustment component adjusts the tension of the conveyor belt of the conveyor belt unit acted by the clamping component.

5. A testing machine according to claim 4, characterized in that: The deflection correction adjustment component includes a deflection correction adjustment action member and a deflection correction adjustment connection component. The deflection correction adjustment action member acts on the deflection correction adjustment connection component, and the deflection correction adjustment connection component is connected to the clamping component.

6. A testing machine according to claim 5, characterized in that: The deviation correction and adjustment connection assembly includes a mounting connection block and a first connection column. The mounting connection block is provided with a strip hole, and the strip hole is connected to the base frame through a fastener. The first connection column is passed through and fixed on the mounting connection block and connected to the clamping assembly.

7. A testing machine according to claim 6, characterized in that: The clamping assembly includes a clamping roller, the axis of which is arranged perpendicular to the conveying direction of the conveyor belt unit, and has an axial inner end extending above the conveyor belt and an axial outer end exposed above the conveyor belt, the axial inner end is arranged higher than the axial outer end, the axial inner end is connected to the base frame, and the axial outer end is connected to the first connecting column.

8. A testing machine according to any one of claims 1 to 7, characterized in that: The same-side transmission unit and the opposite-side transmission unit are both pulley transmission components; the reversing component includes a pair of gears meshing with each other, one of which is coaxially arranged with the pulley of the opposite-side transmission unit, and the other is coaxially arranged with the conveying shaft of the upper conveyor belt unit.

9. A testing machine according to claim 1, characterized in that: The base frame includes a fixed base frame and a movable base frame, the upper conveyor belt unit is arranged on the movable base frame, the first driving unit, the second driving unit, the lower conveyor belt unit, and the detection mechanism are all arranged on the fixed base frame, wherein the first driving unit drives the movable base frame to move, and the second driving unit drives the detection mechanism to move.

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