Conveying mechanism and PCB detection equipment

Abstract

The utility model belongs to the technical field of material conveying, and particularly relates to a conveying mechanism and PCB detection equipment. The conveying mechanism comprises a fixing seat, a driving part and a conveying belt, the conveying belt is arranged on the fixing seat, the driving part is installed on the fixing seat, and the driving part is used for driving the conveying belt to move so that the conveying belt can convey the material plate in the first direction; a first adsorption cavity and a plurality of second adsorption cavities are formed in the fixed seat, and the plurality of second adsorption cavities are mutually independent and are arranged around the first adsorption cavity; a plurality of adsorption holes are formed in the conveying belt, the first adsorption cavity and the second adsorption cavity communicate with the adsorption holes in the corresponding areas of the conveying belt correspondingly so that a material plate on the conveying belt can be adsorbed, the adsorption area on the fixing base can adapt to the size of the plate, therefore, the adsorption force on the plate is guaranteed, and then the positioning precision of the plate on the conveying belt is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of material conveying, and particularly relates to a conveying mechanism and a PCB detection device. Background Art

[0002] During the manufacturing process of a PCB, due to being easily affected by process limitations and environmental factors, various defects often occur on the PCB, such as short circuits, open circuits, broken wires, poor solder joints, etc. To ensure the quality of the PCB, an optical detection method is usually adopted to detect and identify these defects to ensure the reliability of the PCB product.

[0003] During the optical detection process, the PCB needs to be positioned on the conveying mechanism. However, the existing conveying mechanisms are usually based on vibrating discs or belt conveyors, which are easily interfered by the external environment, unable to ensure the stability and positioning accuracy of the PCB, and affecting the accuracy of defect detection. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is: aiming at the problem that the existing conveying mechanism is easily interfered by the external environment and unable to ensure the stability and positioning accuracy of the PCB, a conveying mechanism and a PCB detection device are provided.

[0005] To solve the above technical problem, on the one hand, an embodiment of the utility model provides a conveying mechanism, including a fixed seat, a driving member, and a conveyor belt. The conveyor belt is arranged on the fixed seat, the driving member is installed on the fixed seat, and the driving member is used to drive the conveyor belt to move so that the conveyor belt can convey a material plate along a first direction;

[0006] A first adsorption cavity and a second adsorption cavity are arranged on the fixed seat. The second adsorption cavity surrounds the first adsorption cavity, and the first adsorption cavity and the second adsorption cavity are used to communicate with a vacuum device;

[0007] A plurality of adsorption holes are arranged on the conveyor belt at intervals in pairs. The first adsorption cavity and the second adsorption cavity are respectively communicated with the adsorption holes in the corresponding areas on the conveyor belt to be able to adsorb the material plate on the conveyor belt.

[0008] Optionally, a plurality of second adsorption cavities are provided. The plurality of second adsorption cavities are independent of each other and surround the first adsorption cavity.

[0009] Optionally, the fixed seat includes a first adsorbent and a second adsorbent. The first adsorption cavity and the plurality of second adsorption cavities are arranged on the first adsorbent, and the second adsorbent is connected to the first adsorbent to close the first adsorption cavity and the second adsorption cavity.

[0010] Optionally, in the first direction, the first adsorption cavity is disposed at one end of the first adsorbing member, and a plurality of the second adsorption cavities are arranged at intervals in the first direction.

[0011] Optionally, the first adsorption cavity is square, the second adsorption cavity includes a first cavity and a second cavity that communicate with each other, the first adsorbing member has an adjacent first side and a second side, the first side extends in the first direction, the second side extends in a second direction, and the first direction and the second direction are neither parallel nor coincident;

[0012] The first cavity extends from the second side towards the second cavity in the first direction, and the second cavity extends towards the first side in the second direction.

[0013] Optionally, a plurality of connection holes are provided on the second adsorbing member, and at least one of the first adsorption cavity and the second adsorption cavity communicates with the adsorption hole through the connection hole.

[0014] Optionally, a plurality of grooves are provided on a surface of the second adsorbing member facing away from the first adsorbing member, the grooves extend in the first direction, and at least one of the connection holes is provided in each groove;

[0015] The plurality of grooves are arranged in an array on the second adsorbing member.

[0016] Optionally, the fixing base further includes a plurality of supporting bases, the first adsorbing member is disposed on the plurality of supporting bases, and the second adsorbing member is disposed on a side of the first adsorbing member facing away from the supporting bases.

[0017] Optionally, a sealing groove is provided on one of the first adsorbing member and the second adsorbing member, and a sealing strip is provided on the other, and the sealing strip is embedded in the sealing groove to seal a gap between the first adsorbing member and the second adsorbing member.

[0018] Optionally, a first air suction port and a second air suction port are provided on the fixing base, the first air suction port communicates with the first adsorption cavity so that a negative pressure can be formed in the first adsorption cavity, and the second air suction port communicates with the second adsorption cavity so that a negative pressure can be formed in the second adsorption cavity.

[0019] Optionally, the driving member includes a driving motor, a driving roller shaft, a driven roller shaft and a plurality of tensioning roller shafts, the driving roller shaft and the driven roller shaft are installed at two ends of the fixing base in the first direction, the conveyor belt is wound around the driving roller shaft and the driven roller shaft, and an output end of the driving motor is connected to the driving roller shaft;

[0020] Both ends of the tensioning roller are connected with roller seats, a plurality of the tensioning rollers are arranged at intervals along the first direction, and the plurality of the tensioning rollers are used to tension the conveyor belt;

[0021] At least one of the tensioning rollers is provided with an adjusting member, the adjusting member is provided with a locking member and an adjusting hole, the locking member can pass through the adjusting hole and be connected to the roller seat;

[0022] The roller seat is provided with a slide groove, and the adjusting member can move along the slide groove and drive the locking member to move in the adjusting hole.

[0023] Optionally, the conveying mechanism also includes a first roller group and a second roller group, the first roller group and the second roller group are installed at both ends of the fixed seat in the first direction, the first roller group is used to drive the material plate into the conveyor belt from the feed side of the conveyor belt, and the second roller group is used to drive the material plate to leave the conveyor belt from the discharge side of the conveyor belt.

[0024] On the other hand, an embodiment of the utility model provides a PCB detection device, including a machine platform, a detection mechanism and the conveying mechanism as described above, the detection mechanism and the conveying mechanism are arranged on the machine platform, and the detection mechanism is used to detect the material plate on the conveyor belt.

[0025] The conveying mechanism provided by the embodiment of the utility model forms negative pressure in the first adsorption chamber and the second adsorption chamber through external vacuum equipment, generating suction, so that under the suction of the first adsorption chamber and the second adsorption chamber, the material plate can be firmly adsorbed on the conveyor belt, which can reduce the interference of the outside world on the material plate, ensure the stability and positioning accuracy of the material plate, and ensure the imaging quality of the plate material. The first adsorption chamber and the second adsorption chamber are independent of each other, and the first adsorption chamber and the second adsorption chamber can be selectively connected to the vacuum equipment, so that the adsorption area on the fixed seat can be adjusted. When material plates of different sizes enter the conveyor belt, the adsorption area can be adaptively adjusted according to the size of the material plate, which can ensure good adsorption of material plates of different plate pairs and avoid local vacuum leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of a conveying mechanism provided by an embodiment of the utility model;

[0027] Figure 2 It is a schematic diagram of a conveyor belt provided by an embodiment of the utility model;

[0028] Figure 3 It is an exploded view of a conveying mechanism provided in one embodiment of the utility model;

[0029] Figure 4It is the front view schematic diagram of the first adsorbing component provided by an embodiment of the present utility model;

[0030] Figure 5 It is the bottom view schematic diagram of the first adsorbing component provided by an embodiment of the present utility model;

[0031] Figure 6 It is the schematic diagram of the second adsorbing component provided by an embodiment of the present utility model.

[0032] The reference numerals in the specification are as follows:

[0033] 1. Fixed seat; 11. First adsorbing component; 111. First adsorption cavity; 112. Second adsorption cavity; 1121. First cavity; 1122. Second cavity; 113. First side; 114. Second side; 115. First air inlet; 116. Second air inlet; 12. Second adsorbing component; 121. Connecting hole; 122. Groove; 13. Support seat;

[0034] 2. Driving component; 21. Driving motor; 22. Driving roller shaft; 23. Driven roller shaft; 24. Tensioning roller shaft; 25. Roller shaft seat; 251. Slide groove;

[0035] 3. Conveyor belt; 31. Adsorption hole;

[0036] 4. Adjusting component; 41. Adjusting hole; 42. Ear seat; 43. Tightening component

[0037] 5. First roller group; 51. First connecting shaft; 52. First roller;

[0038] 6. Second roller group; 61. Second connecting shaft; 62. Second roller;

[0039] a. First direction; b. Second direction. Detailed implementation manners

[0040] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0041] As Figures 1 to 6 shown, a conveying mechanism provided by an embodiment of the present utility model includes a fixed seat 1, a driving component 2 and a conveyor belt 3. The conveyor belt 3 is arranged on the fixed seat 1, and the driving component 2 is installed on the fixed seat 1. The driving component 2 is used to drive the conveyor belt 3 to move so that the conveyor belt 3 can convey the material plate along the first direction a.

[0042] The fixed seat 1 is provided with a first adsorption cavity 111 and a second adsorption cavity 112 which are spaced apart from each other. The second adsorption cavity 112 is arranged around the first adsorption cavity 111. The first adsorption cavity 111 and the second adsorption cavity 112 are used to communicate with a vacuum device so that a negative pressure can be formed in the first adsorption cavity 111 and the second adsorption cavity 112.

[0043] The conveyor belt 3 is provided with a plurality of adsorption holes 31 which are spaced apart in pairs. The first adsorption cavity 111 and the second adsorption cavity 112 are respectively communicated with the adsorption holes 31 in the corresponding areas on the conveyor belt 3 to be able to adsorb the material plate on the conveyor belt 3, so that the material plate on the conveyor belt 3 can be kept flat under the negative pressure of the first adsorption cavity 111 and / or the second adsorption cavity 112, preventing the material plate from warping on the conveyor belt 3 and facilitating the detection of the material plate. Herein, "a plurality" means greater than or equal to two, and the meaning of "a plurality" is the same in each embodiment and will not be elaborated hereinafter.

[0044] In this embodiment, after the material plate enters the conveyor belt 3, adsorption is started. By means of an external vacuum device, a negative pressure is formed in the first adsorption cavity 111 and the second adsorption cavity 112 to generate suction force. The first adsorption cavity 111 can adsorb the material plate through the adsorption cavity in the corresponding area on the conveyor belt 3, and the second adsorption cavity 112 can adsorb the material plate through the adsorption holes 31 in the corresponding area on the conveyor belt 3. Thus, under the suction force of the first adsorption cavity 111 and the second adsorption cavity 112, the material plate can be firmly adsorbed on the conveyor belt 3, reducing the interference of the outside world on the material plate, ensuring the stability and positioning accuracy of the material plate, and thus improving the effect and efficiency of defect detection.

[0045] In addition, the first adsorption cavity 111 and the second adsorption cavity 112 are independent of each other. The first adsorption cavity 111 and the second adsorption cavity 112 can be selectively communicated with the vacuum device, so as to realize the adjustment of the adsorption area on the fixed seat 1. When material plates of different sizes enter the conveyor belt 3, the adsorption area can be adaptively adjusted according to the size of the material plate, ensuring good adsorption of material plates of different sizes, avoiding the situation of local vacuum leakage, and at the same time improving the energy utilization efficiency of the vacuum device and saving energy.

[0046] In one embodiment, as Figure 3 shown, the conveyor belt 3 surrounds the fixed seat 1 and is in a closed structure. The upper part of the conveyor belt 3 is located above the fixed seat 1, and the lower part of the conveyor belt 3 is located below the fixed seat 1. The material plate is placed on the upper part of the conveyor belt 3. Driven by the driving member 2, the conveyor belt 3 drives in a loop and can drive the material plate to move in the first direction.

[0047] When performing adsorption positioning, since the first adsorption cavity 111 and the second adsorption cavity 112 are spaced apart from each other, as in Figure 1In the up-down direction, the upper part of the conveyor belt 3 has a first area corresponding to the first adsorption cavity 111, and the upper part of the conveyor belt 3 has a second area corresponding to the second adsorption cavity 112. The first adsorption cavity 111 adsorbs the material plate through the adsorption holes 31 in the first area, and the second adsorption cavity 112 adsorbs the material plate through the adsorption holes 31 in the second area.

[0048] In one embodiment, as Figure 4 shown, a plurality of second adsorption cavities 112 are provided. The plurality of second adsorption cavities 112 are independent of each other and are arranged around the first adsorption cavity 111. By arranging the plurality of second adsorption cavities 112 around the first adsorption cavity 111, a plurality of independent adsorption cavities can be obtained. Through the selective opening of the first adsorption cavity 111 and the plurality of second adsorption cavities 112, a variety of different-sized adsorption areas can be combined. When conveying the sheet material, according to the size of the sheet material, the first adsorption cavity 111 and different numbers of second adsorption cavities 112 are selectively opened, so that the adsorption area on the fixing seat 1 can adapt to the size of the sheet material, and the positioning accuracy of the sheet materials with various different sizes can be further ensured.

[0049] Among them, in order to facilitate the description of the relationship between the plurality of second adsorption cavities 112 and the first adsorption cavity 111, the plurality of second adsorption cavities 112 are numbered 1, 2... n. Among them, the No. 1 second adsorption cavity 112 is the position closest to the first adsorption cavity 111, and n is the position farthest from the first adsorption cavity 111. The plurality of second adsorption cavities 112 are independent of each other. The No. 1 second adsorption cavity 112 surrounds the first adsorption cavity 111, the No. 2 second adsorption cavity 112 surrounds the No. 1 second adsorption cavity 112, and the remaining second adsorption cavities 112 are arranged in sequence in order, thus forming a structure in which the plurality of second adsorption cavities 112 surround the first adsorption cavity 111.

[0050] In one embodiment, as Figure 3 shown, the fixing seat 1 includes a first adsorbent 11 and a second adsorbent 12. The first adsorption cavity 111 and the plurality of second adsorption cavities 112 are arranged on the first adsorbent 11, and the second adsorbent 12 is connected to the first adsorbent 11 to close the first adsorption cavity 111 and the second adsorption cavity 112. Among them, the first adsorption cavity 111 and the second adsorption cavity 112 are in a groove 122 structure on the first adsorbent 11 and are recessed in a direction away from the second adsorbent 12. The opening directions of the first adsorption cavity 111 and the second adsorption cavity 112 both face the second adsorbent 12. After covering the second adsorbent 12 on the first adsorbent 11 like this, the openings of the first adsorption cavity 111 and the second adsorption cavity 112 can be closed, so that the first adsorption cavity 111 and the second adsorption cavity 112 form a closed cavity.

[0051] After the first adsorption cavity 111 and the second adsorption cavity 112 are closed by the second adsorbent 12, it can ensure that the adsorption force is evenly distributed between the fixed seat 1 and the material plate, so that the material plate is subjected to a uniform adsorption force, avoiding problems such as insecure adsorption or object deformation caused by excessive or too small local adsorption force.

[0052] In one embodiment, as Figure 4 shown, in the first direction a, the first adsorption cavity 111 is arranged at one end of the first adsorbent 11, and a plurality of second adsorption cavities 112 are arranged at intervals along the first direction a, which is convenient for adjusting the distribution of the adsorption force according to the shape and size of the material plate, and improving the stability and reliability of the adsorption.

[0053] Further, in the first direction, one side of the conveyor belt 3 is the inlet side, and the other side is the outlet side. After the material plate arrives at the inlet side of the conveyor belt 3 from the previous process, the conveyor belt 3 moves and drives the material plate to move. After the material plate reaches the detection position, defect detection is carried out. After the material plate detection is completed, the conveyor belt 3 drives the material plate to move so that the material plate leaves the conveyor from the outlet side. Among them, the first adsorption cavity 111 is arranged at one end of the first adsorbent 11 close to the outlet side, and a plurality of second adsorption cavities 112 are arranged at intervals in sequence facing the inlet side of the conveyor belt 3.

[0054] In one embodiment, as Figure 4 shown, the first adsorption cavity 111 is square, the second adsorption cavity 112 includes a first cavity 1121 and a second cavity 1122 that communicate with each other. The first adsorbent 11 has an adjacent first side 113 and a second side 114. The first side 113 extends along the first direction a, and the second side 114 extends along the second direction b. The first direction a and the second direction b are not parallel and do not coincide. The first cavity 1121 extends from the second side 114 towards the second cavity 1122 along the first direction a, and the second cavity 1122 extends towards the first side 113 along the second direction b, so that the adsorption force can be applied to the material plate in the first direction and the second direction. The adsorption force can be spread more evenly on the surface of the material plate through the extension of the cavities in two directions, reducing the possibility of the material plate deforming due to local stress concentration, and realizing a more uniform adsorption force distribution on the surface of the material plate.

[0055] Further, the first direction a and the second direction b are perpendicular, so that the second adsorption cavity 112 is L-shaped, the first adsorption cavity 111 is square, and the first adsorption cavity 111 is located in the area defined by the first cavity 1121 and the second cavity 1122.

[0056] Among them, the material plate is a PCB, and the PCB is square, so that the adsorption force can be applied to the PCB from the length and width directions of the PCB respectively, and it can better adapt to the adsorption of different sizes of PCBs.

[0057] In one embodiment, the first adsorption cavity 111 is located at a corner of the first adsorbent member 11. The second adsorption cavity 112 is L-shaped, and a square first adsorption cavity 111 is defined by the first side 113, the second side 114 of the first adsorbent member 11, and the first cavity 1121 and the second cavity 1122.

[0058] In other alternative embodiments, the second adsorption cavity 112 further includes a third cavity (not shown). The first cavity 1121, the second cavity 1122, and the third cavity communicate with each other. The first cavity 1121 extends from the second side 114 towards the second cavity 1122 along a first direction. The second cavity 1122 extends towards the first side 113 along a second direction. The third cavity extends from the second cavity 1122 towards the second side 114 along the first direction, such that the second adsorption cavity 112 has a C-shaped structure. The first adsorption cavity 111 is located at the middle position of the second side 114 of the first adsorbent member 11, and a square first adsorption cavity 111 is defined by the second side 114, the first cavity 1121, the second cavity 1122, and the third cavity.

[0059] In one embodiment, as Figure 3 , Figure 6 shown, a plurality of connection holes 121 are provided on the second adsorbent member 12. At least one of the first adsorption cavity 111 and the second adsorption cavity 112 communicates with the adsorption hole 31 through the connection holes 121. The connection holes 121 enable the communication between the first adsorption cavity 111 and / or the second adsorption cavity 112 and the adsorption hole 31, such that when vacuum adsorption is generated, the adsorption force can effectively be transmitted from the adsorption cavity to the adsorption hole 31, and then act on the pallet placed on the conveyor belt 3. This ensures the normal functioning of the adsorption function of the entire adsorption system and ensures that the pallet can be firmly adsorbed.

[0060] Among them, the number of the connection holes 121 is set according to different adsorption requirements. The magnitude of the adsorption force can be adjusted by adjusting the size, number, or shape of the connection holes 121.

[0061] In one embodiment, as Figure 6 shown, a plurality of grooves 122 are provided on the surface of the second adsorbent member 12 facing away from the first adsorbent member 11. The grooves 122 extend along a first direction a, and the plurality of grooves 122 are arranged in an array on the second adsorbent member 12. At least one connection hole 121 is provided in each groove 122. The connection holes 121 and the grooves 122 enable the communication between the first adsorption cavity 111 and / or the second adsorption cavity 112 and the adsorption hole 31. By arranging the connection holes 121 in the grooves 122, when vacuum adsorption is performed, the adsorption force is generated from the grooves 122 and acts on the pallet, thereby increasing the effective adsorption area between the adsorption cavity and the pallet and increasing the adsorption force.

[0062] Among them, the groove 122 is provided on the surface of the second adsorbing member 12 facing away from the first adsorbing member 11 and is recessed in the direction of the first adsorbing member 11. Through a plurality of grooves 122 arranged in an array, the entire surface of the second adsorbing member 12 can be distributed with grooves 122, so that the material plates at any position on the conveyor belt 3 can be well adsorbed.

[0063] In one embodiment, as Figure 2 、 Figure 3 shown, the fixing base 1 further includes a plurality of support bases 13. The first adsorbing member 11 is arranged on the plurality of support bases 13, and the second adsorbing member 12 is arranged on the side of the first adsorbing member 11 facing away from the support bases 13. The first adsorbing member 11 and the second adsorbing member 12 are supported by the plurality of support bases 13 to provide a stable support foundation.

[0064] Among them, in the second direction b, a part of the support bases 13 are arranged on one side of the fixing base 1, and the remaining support bases 13 are arranged on the other side of the fixing base 1. The support bases 13 are dispersed on both sides of the fixing base 1 to stably support the fixing base 1 and do not affect the winding of the annular conveyor belt 3.

[0065] In one embodiment, a sealing groove is provided on one of the first adsorbing member 11 and the second adsorbing member 12, and a sealing strip is provided on the other. The sealing strip is embedded in the sealing groove to seal the gap between the first adsorbing member 11 and the second adsorbing member 12. When performing vacuum adsorption, it prevents vacuum leakage from the gap between the first adsorbing member 11 and the second adsorbing member 12 and avoids affecting the adsorption force applied to the material plate.

[0066] In one embodiment, as Figure 5 shown, the fixing base 1 is provided with a first air suction port 115 and a second air suction port 116. The first air suction port 115 is communicated with the first adsorption cavity 111 so that a negative pressure can be formed in the first adsorption cavity 111, and the second air suction port 116 is communicated with the second adsorption cavity 112 so that a negative pressure can be formed in the second adsorption cavity 112.

[0067] The vacuum device is communicated with the first adsorption cavity 111 through the first air suction port 115, and the vacuum device is communicated with the second adsorption cavity 112 through the second air suction port 116. Thus, the negative pressures in the first adsorption cavity 111 and the second adsorption cavity 112 can be independently controlled respectively, and the opening adsorption and closing adsorption of the first adsorption cavity 111 and the second adsorption cavity 112 can be controlled respectively, so as to meet the adsorption requirements of the material plates of different plate pairs.

[0068] Preferably, the first air suction port 115 and the second air suction port 116 are arranged on the first adsorbing member 11.

[0069] In one embodiment, as Figure 2 、 Figure 3As shown, the driving member 2 includes a driving motor 21, a driving roller shaft 22, a driven roller shaft 23 and a plurality of tension roller shafts 24. The driving roller shaft 22 and the driven roller shaft 23 are installed at both ends of the fixed seat 1 in the first direction a. The conveyor belt 3 is wound around the driving roller shaft 22 and the driven roller shaft 23. The output end of the driving motor 21 is connected to the driving roller shaft 22. The driving motor 21 can drive the driving roller shaft 22 to rotate, thereby driving the conveyor belt 3 to move, and further driving the material plate placed on the conveyor belt 3 to move in the first direction.

[0070] Both ends of the tension roller shaft 24 are connected with roller shaft seats 25. The tension roller shaft 24 can be supported by the two roller shaft seats 25 in the second direction b. The plurality of tension roller shafts 24 are arranged at intervals in the first direction. The plurality of tension roller shafts 24 are arranged between the driving roller shaft 22 and the driven roller shaft 23. The plurality of tension roller shafts 24 are used to tension the conveyor belt 3. A certain tension can be applied to the conveyor belt 3 through the tension roller shafts 24, and the friction between the conveyor belt 3 and the driving roller shaft 22 can be increased to prevent the conveyor belt 3 from slipping during transportation.

[0071] In one embodiment, as Figure 3 shown, at least one tension roller shaft 24 is provided with an adjusting member 4. The adjusting member 4 is provided with a locking member and an adjusting hole 41. The locking member can pass through the adjusting hole 41 and be connected to the roller shaft seat 25. The roller shaft seat 25 is provided with a sliding groove 251. The adjusting member 4 can move along the sliding groove 251 and drive the locking member to move in the adjusting hole 41. By moving the adjusting member 4 along the sliding groove 251 of the roller shaft seat 25, the position of the tension roller shaft 24 can be accurately adjusted according to the actual needs of the conveyor belt 3, so as to realize the precise adjustment of the tension of the conveyor belt 3.

[0072] During the adjustment process, loosen the connection of the locking member on the roller shaft seat 25. After the position adjustment of the tension roller shaft 24 is completed, fix the adjusting member 4 on the roller shaft seat 25 through the locking member, which ensures that the position of the tension roller shaft 24 will not easily shift during the operation of the conveyor belt 3, ensures the stability of the tension, and thus ensures the stable operation of the conveyor belt 3.

[0073] Among them, the locking member is a screw or a bolt. The adjusting hole 41 is a strip-shaped hole. After loosening the bolt, the locking member can move along the strip-shaped hole, so that the adjusting member 4 can move along the slide of the roller shaft seat 25, and further realize the adjustment of the position of the tension roller shaft 24 and the adjustment of the tension of the conveyor belt 3. Further, when the tension roller shaft 24 moves downward in the vertical direction as shown in Figure 2 , the tension roller shaft 24 can increase the tension of the conveyor belt 3. After the tension roller shaft 24 moves upward in the vertical direction as shown in Figure 2 , the tension degree of the conveyor belt 3 decreases.

[0074] In one embodiment, as Figure 3As shown, the adjusting member 4 is provided with an ear seat 42 and a tightening member 43 arranged on the ear seat 42, and the tightening member 43 can be detachably connected to the roller seat 25. After the position adjustment of the adjusting member 4 is completed, the tightening member 43 is connected to the roller seat 25, further ensuring that the position of the adjusting member 4 and the tensioning roller 24 will not be easily offset.

[0075] There are two ear seats 42 and two tightening members 43, and the two ear seats 42 are arranged on opposite sides of the first direction of the adjusting member 4. The tightening member 43 is a screw or a bolt.

[0076] In one embodiment, if Figure 1 , Figure 3 As shown, the conveying mechanism also includes a first roller group 5 and a second roller group 6, which are installed at both ends of the fixed seat 1 in the first direction a. The first roller group 5 is used to drive the material sheet into the conveyor belt 3 from the feeding side of the conveyor belt 3, and the second roller group 6 is used to drive the material sheet to leave the conveyor belt 3 from the discharging side of the conveyor belt 3.

[0077] The first roller group 5 is arranged on the feeding side of the conveyor belt 3, which can guide the material sheet to enter the conveyor belt 3 smoothly, provide appropriate power and guidance, ensure that the material sheet can be accurately received by the conveyor belt 3, and avoid the material sheet from being stuck or offset during feeding. The material sheet can smoothly transition to the conveyor belt 3, ensuring the continuity of the production process.

[0078] Arranging the second roller set 6 on the discharge side of the conveyor belt 3 can effectively drive the material sheet to separate from the conveyor belt 3, which helps prevent the material sheet from sticking to the conveyor belt 3 or causing unsmooth discharge during discharge, and ensures that the material sheet can accurately enter the next process.

[0079] In one embodiment, the first roller group 5 includes a first connecting shaft 51 and a plurality of first rollers 52. The first connecting shaft 51 is mounted on the fixing seat 1 and extends along the second direction. The plurality of first rollers 52 are spaced apart along the axial direction of the first connecting shaft 51. When the material sheet is fed to the conveyor belt 3 in the previous process, the first roller group 5 can fill the gap at the transition between the two processes, so that the material sheet can be smoothly transferred to the conveyor belt 3.

[0080] The second roller group 6 includes a second connecting shaft 61 and a plurality of second rollers 62. The second connecting shaft 61 is mounted on the fixing seat 1 and extends along the second direction. The plurality of second rollers 62 are arranged at intervals along the axial direction of the second connecting shaft 61. When the sheet leaves the conveyor belt 3 and moves to the next process, the second roller group 6 can fill the gap at the transition between the two processes, so that the sheet can smoothly transition to the next process.

[0081] On the other hand, an embodiment of the present utility model provides a PCB detection device, which includes a machine table, a detection mechanism and the conveying mechanism of the above embodiment. The detection mechanism and the conveying mechanism are arranged on the machine table, and the detection mechanism is arranged above the conveying mechanism. The detection mechanism is used to detect the material plate on the conveyor belt 3.

[0082] In one embodiment, the PCB detection device is an optical detection device. The detection mechanism uses optical imaging technology to collect images of the PCB and can identify various defects such as short circuits, open circuits, broken wires, and poor solder joints on the PCB.

[0083] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A conveying mechanism, characterized in that, It includes a fixed seat, a driving member, and a conveyor belt. The conveyor belt is arranged on the fixed seat, and the driving member is installed on the fixed seat. The driving member is used to drive the conveyor belt to move so that the conveyor belt can convey the material plate along the first direction. The fixed seat is provided with a first adsorption cavity and a second adsorption cavity that are spaced apart from each other. The second adsorption cavity surrounds the first adsorption cavity. The first adsorption cavity and the second adsorption cavity are used to communicate with a vacuum device. The conveyor belt is provided with a plurality of adsorption holes that are spaced apart in pairs. The first adsorption cavity and the second adsorption cavity are respectively communicated with the adsorption holes in the corresponding areas on the conveyor belt to be able to adsorb the material plate on the conveyor belt.

2. The conveying mechanism according to claim 1, wherein, There are a plurality of the second adsorption cavities. The plurality of second adsorption cavities are independent of each other and surround the first adsorption cavity.

3. The conveying mechanism according to claim 2, wherein, The fixed seat includes a first adsorbent and a second adsorbent. The first adsorption cavity and the plurality of second adsorption cavities are arranged on the first adsorbent. The second adsorbent is connected to the first adsorbent to enclose the first adsorption cavity and the second adsorption cavity.

4. The conveying mechanism according to claim 3, wherein In the first direction, the first adsorption cavity is arranged at one end of the first adsorbent, and the plurality of second adsorption cavities are arranged at intervals along the first direction.

5. The conveying mechanism according to claim 3, wherein The first adsorption cavity is square. The second adsorption cavity includes a first cavity and a second cavity that are communicated with each other. The first adsorbent has an adjacent first side and a second side. The first side extends along the first direction, and the second side extends along the second direction. The first direction and the second direction are not parallel and do not coincide. The first cavity extends from the second side towards the second cavity along the first direction, and the second cavity extends towards the first side along the second direction.

6. The conveying mechanism according to claim 3, characterized in that, The second adsorbent is provided with a plurality of connection holes. At least one of the first adsorption cavity and the second adsorption cavity is communicated with the adsorption holes through the connection holes.

7. The conveying mechanism according to claim 6, wherein, A plurality of grooves are arranged on the surface of the second adsorbent facing away from the first adsorbent. The grooves extend along the first direction, and at least one connection hole is arranged in each groove. The plurality of grooves are arranged in an array on the second adsorbent.

8. The conveying mechanism according to claim 3, wherein The fixed seat further includes a plurality of support seats. The first adsorbent is arranged on the plurality of support seats, and the second adsorbent is arranged on the side of the first adsorbent facing away from the support seats.

9. The conveying mechanism according to claim 3, wherein, A sealing groove is arranged on one of the first adsorbent and the second adsorbent, and a sealing strip is arranged on the other. The sealing strip is embedded in the sealing groove to seal the gap between the first adsorbent and the second adsorbent.

10. The conveying mechanism according to claim 1, characterized in that, The fixed seat is provided with a first air suction port and a second air suction port. The first air suction port is communicated with the first adsorption cavity so that a negative pressure can be formed in the first adsorption cavity. The second air suction port is communicated with the second adsorption cavity so that a negative pressure can be formed in the second adsorption cavity.

11. The conveying mechanism according to any one of claims 1 to 10, characterized in that, The driving member comprises a driving motor, an active roller shaft, a driven roller shaft and a plurality of tensioning roller shafts, wherein the active roller shaft and the driven roller shaft are mounted at two ends of the fixing seat in the first direction, the conveyor belt is wound around the active roller shaft and the driven roller shaft, and the output end of the driving motor is connected to the active roller shaft; Both ends of the tensioning roller are connected with roller seats, a plurality of the tensioning rollers are arranged at intervals along the first direction, and the plurality of the tensioning rollers are used to tension the conveyor belt; At least one of the tensioning rollers is provided with an adjusting member, the adjusting member is provided with a locking member and an adjusting hole, the locking member can pass through the adjusting hole and be connected to the roller seat; The roller seat is provided with a slide groove, and the adjusting member can move along the slide groove and drive the locking member to move in the adjusting hole.

12. The conveying mechanism according to claim 1, wherein, The conveying mechanism also includes a first roller group and a second roller group, the first roller group and the second roller group are installed at both ends of the fixed seat in the first direction, the first roller group is used to drive the material plate into the conveyor belt from the feeding side of the conveyor belt, and the second roller group is used to drive the material plate to leave the conveyor belt from the discharging side of the conveyor belt.

13. A PCB detection device, characterized in that, It comprises a machine platform, a detection mechanism and the conveying mechanism according to any one of claims 1 to 12, wherein the detection mechanism and the conveying mechanism are arranged on the machine platform, and the detection mechanism is used to detect the material plate on the conveyor belt.

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