PCB feeding device and PCB automatic appearance detection equipment

Abstract

The utility model provides a PCB (Printed Circuit Board) feeding device and PCB automatic appearance detection equipment. The PCB feeding device comprises a lifting module, a feeding fence and a lifting driving assembly. The lifting module comprises a lifting frame, a plurality of feeding rollers and a feeding motor, the feeding rollers are arranged at intervals in the transverse direction, and the feeding fence comprises a feeding seat and a feeding vertical rod; the feeding base is connected to the rack in a sliding mode in the longitudinal direction and located below the feeding roller. The multiple feeding vertical rods are arranged at intervals in the transverse direction, each feeding vertical rod is located in a gap between every two adjacent feeding rollers, the bottom end of each feeding vertical rod is connected with the feeding base, and the top end of each feeding vertical rod extends to the position above the corresponding feeding roller. The lifting driving assembly is arranged on the rack and connected to the lifting frame so as to drive the lifting module to move in the vertical direction. The space above the feeding roller is divided by the feeding column, so that PCBs with small sizes are conveyed side by side, the conveying efficiency is improved, and the PCBs on the two sides can be prevented from making contact with each other; and the lifting module can simultaneously drive the two piles of PCBs to rise gradually, so that the efficiency can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of PCB appearance detection equipment, in particular to a PCB feeding device and PCB automatic appearance detection equipment. Background Art

[0002] In the prior art, the conveying and loading modules of PCB appearance inspection equipment have fixed sizes and can only convey one row of PCBs. However, the sizes of PCBs vary. For smaller PCBs, single-row conveying cannot effectively utilize the modules of the inspection equipment and affects the loading and inspection efficiency. If two rows of PCBs are conveyed at the same time, the two rows of PCBs may collide with each other, causing damage to the PCBs.

[0003] Therefore, it is necessary to provide a PCB feeding device and a PCB automatic appearance inspection device to improve the feeding efficiency. Utility Model Content

[0004] The utility model provides a PCB feeding device and PCB automatic appearance detection equipment, which can effectively improve the feeding efficiency.

[0005] The utility model provides a PCB feeding device, which is arranged on a frame and comprises a lifting module, a feeding bar and a lifting drive assembly; the lifting module comprises a lifting frame, a feeding roller and a feeding motor, the feeding roller is a plurality of the feeding rollers arranged at intervals along the horizontal direction, the axial direction of each feeding roller is longitudinal direction, and the feeding motor is connected to the lifting frame around its own axial direction, and the feeding motor is arranged on the lifting frame and is drivingly connected to the plurality of the feeding rollers; the feeding bar comprises a feeding seat and a feeding vertical rod; the feeding seat is connected to the frame in a longitudinal sliding manner and is located below the feeding roller; the feeding vertical rod is a plurality of the feeding vertical rods arranged at intervals along the horizontal direction, each feeding vertical rod is located in the gap between adjacent feeding rollers, the bottom end of the feeding seat is connected to the feeding seat, and the top end extends above the feeding roller; the lifting drive assembly is arranged on the frame and connected to the lifting frame to drive the lifting module to move vertically.

[0006] Wherein, the feeding bar also includes a feeding cross bar, which is arranged in the transverse direction, and the top end of each feeding vertical rod is connected to the feeding cross bar.

[0007] Among them, the lifting frame includes a connecting plate, a cross plate, two side plates and two mounting strips; the connecting plate is connected to the lifting drive assembly so as to be lifted and lowered under the drive of the lifting drive assembly; the two side plates are parallel to each other and are respectively connected to the connecting plate at both ends in the longitudinal direction; each side plate has a relative connecting end and a suspended end in the transverse direction, and the connecting end is fixedly connected to the connecting plate; in the vertical direction, the size of the connecting end is larger than the size of the suspended end; the cross plate is horizontally arranged and fixed between the two side plates, and the cross plate is located below the feeding roller, and a clearance bar hole is arranged on the cross plate at the position corresponding to the feeding vertical rod, and the two mounting strips are respectively connected to the top of the two side plates, and the two ends of each feeding roller are rotatably connected to the two mounting strips.

[0008] Among them, a bearing is arranged at the end of the feeding roller; the mounting strip includes a fixing strip and a closing strip, a plurality of mounting grooves are arranged on the fixing strip, and the top of the mounting groove is open; the closing strip is fixed to the top of the fixing strip and closes the opening of the mounting groove, and the bearing is limited in the mounting groove.

[0009] Among them, the frame includes a loading rack, and the loading rack includes a back plate, a bottom plate, a top plate and a baffle plate. The back plate and the baffle plate are both vertically arranged, and the bottom plate and the top plate are horizontally arranged, and are both located on the same side of the back plate. The bottom surface of the bottom plate is fixed to the bottom end of the back plate through a reinforcing plate, and the loading seat is slidably connected to the top surface of the bottom plate; the top plate is fixed to the top end of the back plate, and the baffle plate is fixedly connected to the top plate and extends downward to the bottom plate; the lifting drive assembly is arranged between the baffle plate and the back plate, and the connecting plate is located between the lifting drive assembly and the baffle plate, and its longitudinal ends protrude from the baffle plate.

[0010] Wherein, the lifting module is provided with a first sensor and a second sensor, the first sensor and the second sensor are arranged in a transverse direction, and are both used to sense the front end position of the PCB;

[0011] The first sensor is located in front of the second sensor and is used to limit the end position of the PCB conveyed forward. When the front end of the PCB moves to the first sensor, the feeding motor stops running.

[0012] The number of the feeding rollers between the second sensor and the first sensor is less than the number of the feeding rollers on the side of the second sensor away from the first sensor; when the front end of the PCB moves to the second sensor, the feeding motor slows down.

[0013] Wherein, the loading upright rod is rotatably connected to the loading seat.

[0014] Among them, the multiple loading rods are divided into multiple first loading rods and multiple second loading rods, the first loading rods and the second loading rods are staggered in the longitudinal direction, and the two are alternately arranged on the loading seat in the transverse direction.

[0015] Wherein, a loading longitudinal rod is arranged on one side of the loading vertical rod, the loading longitudinal rod is arranged horizontally in the longitudinal direction, the diameter of the loading longitudinal rod is smaller than the gap between adjacent loading rollers, one end of the loading longitudinal rod is rotatably connected to the loading vertical rod, when the loading vertical rod is located at one end of the loading roller, the other end of the loading longitudinal rod is located at the middle position of the loading roller;

[0016] When the lifting module moves down to the separation position, the top surface of the feeding roller is lower than the top surface of the feeding longitudinal rod, and the vertical distance between the two is smaller than the thickness of the PCB, and the feeding roller is separated from the PCB on the feeding longitudinal rod.

[0017] The utility model also provides a PCB automatic appearance inspection device, comprising a conveying device, a frame, and the aforementioned PCB loading device, wherein the PCB loading device is arranged on the frame;

[0018] The conveying device comprises a conveying frame, a conveying fence, a conveying roller and a conveying motor. The conveying rollers are arranged in a plurality at intervals along the transverse direction. The axial direction of each conveying roller is longitudinal and is connected to the conveying frame by rotation around its own axial direction. The conveying motor is arranged on the conveying frame and is connected to the plurality of conveying rollers by transmission. The conveying fence comprises a conveying seat and a conveying upright rod. The conveying seat is connected to the conveying frame by sliding along the longitudinal direction and is located below the conveying roller. The conveying upright rods are arranged in a plurality at intervals along the transverse direction. Each conveying upright rod is located in the gap between adjacent conveying rollers, and its bottom end is connected to the conveying seat and its top end extends above the conveying roller.

[0019] The loading bar of the PCB loading device is detachably connected to the conveying bar.

[0020] The utility model provides a PCB feeding device and PCB automatic appearance inspection equipment. The feeding bar divides the space above the feeding roller so that smaller PCBs can be transported side by side, thereby improving the transportation efficiency. The feeding bar can avoid the contact between the PCBs on both sides. The conveying bar moves relative to the conveying frame as a whole, so as to divide the space above the conveying roller. When the conveying bar is located at the end, only one row of larger PCBs can be transported. When the conveying bar and the feeding bar are located in the middle, smaller PCBs can be transported side by side on both sides of the conveying bar and the feeding bar, thereby improving the transportation efficiency. The conveying bar and the feeding bar can avoid the contact between the PCBs on both sides. The lifting module can drive two piles of PCBs to rise gradually at the same time, so that the PCBs stacked on the feeding roller can be moved up layer by layer, so as to be close to the transfer device in the next step, so that the transfer device can grab the two PCBs side by side at the top, thereby facilitating the next step of operation and improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of a PCB automatic appearance inspection device provided in the first embodiment of the utility model;

[0022] Figure 2 yes Figure 1 A in the enlarged view;

[0023] Figure 3 yes Figure 1 A schematic diagram of the structure of the conveying device of the PCB automatic appearance inspection equipment;

[0024] Figure 4 yes Figure 3 A schematic diagram of the structure of the conveyor bar of the middle conveying device at the middle position;

[0025] Figure 5 yes Figure 4 The enlarged view of point B in the figure;

[0026] Figure 6 yes Figure 1 Structural diagram of PCB loading device and loading rack of PCB automatic appearance inspection equipment;

[0027] Figure 7 yes Figure 6 A schematic diagram of the structure of the loading bar of the PCB loading device in the middle position;

[0028] Figure 8 yes Figure 7 A schematic diagram of the structure of the lifting module of the PCB loading device;

[0029] Fig. 9 yes Figure 7 Schematic diagram of the structure of the middle loading rack and the lifting drive assembly;

[0030] Fig.10 This is a schematic diagram of the arrangement of the loading poles provided in the second embodiment of the utility model;

[0031] Fig.11 It is a structural schematic diagram of a feeding bar and a feeding module provided in the third embodiment of the utility model;

[0032] Fig.12 yes Fig.11 Schematic diagram of the structure of the middle loading boom. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0034] In the figures, structurally similar elements are denoted by the same reference numerals.

[0035] Please refer to Figure 1 and Figure 2 The first embodiment of the utility model provides a PCB automatic appearance inspection device, including a frame 100, a PCB loading device 1, a conveying device 2, a transfer device 3, a translation device 4, and a camera device 5. The conveying device 2 is used to convey the PCB board to the frame 100. The PCB loading device 1, the transfer device 3, the translation device 4 and the camera device 5 are all arranged on the frame 100. The PCB loading device 1 is used to receive the PCB conveyed by the conveying device 2 and lift it. The transfer device 3 is located between the PCB loading device 1 and the translation device 4, and is used to move the PCB lifted by the PCB loading device 1 to the translation device 4. The translation device 4 is used to drive the PCB to move horizontally. The camera device 5 is located above the translation device 4, so that the camera device 5 can be used to take pictures of the PCB on the translation device 4.

[0036] like Figure 2 , Figure 3 and Figure 4 As shown, the conveying device 2 includes a conveying frame 21 , a conveying fence 22 , a conveying roller 23 and a conveying motor 24 . The conveying frame 21 provides support for the entire conveying device 2 , and the conveying fence 22 , the conveying roller 23 and the conveying motor 24 are all arranged on the conveying frame 21 .

[0037] A plurality of universal wheels 211 are provided at the bottom of the conveying frame 21, and the conveying frame 21 is movably arranged on one side of the frame 100, so that the entire conveying device 2 can be moved relative to the frame 100. When the conveying device 2 fails, the entire device can be replaced. At the same time, the conveying device 2 can also be used in other equipment for convenient use.

[0038] The bottom of the conveyor frame 21 is also provided with a plurality of height-adjustable support feet 212, through which the entire conveyor device 2 can be raised, so that the universal wheels 211 are off the ground, and the conveyor frame 21 is fixed at a certain position, that is, the positions of the conveyor device 2 and the rack 100 are relatively fixed. A positioning mechanism, a locking mechanism, etc. can also be provided between the conveyor frame 21 and the rack 100 to align and fix the conveyor device 2 and the rack 100, so as to facilitate the conveying of circuit boards.

[0039] The conveying rollers 23 are arranged in a plurality of intervals along the horizontal direction X, and the axial direction of each conveying roller 23 is the longitudinal direction Y, and is connected to the conveying frame 21 for rotation around its own axis. The conveying motor 24 is provided on the conveying frame 21, and is transmission-connected to the plurality of conveying rollers 23. The conveying motor 24 drives the plurality of conveying rollers 23 to rotate simultaneously, and can convey the PCB placed on the conveying rollers 23 to the PCB loading device 1 on the frame 100. The PCBs can be stacked to form a stack of PCBs, and the stack of PCBs can be conveyed as a whole on the conveying device 2.

[0040] The plurality of conveying rollers 23 are connected by a synchronous chain assembly 25 to achieve synchronous rotation of the plurality of conveying rollers 23. The conveying motor 24 is connected to one or two conveying rollers 23 by a transmission chain assembly to drive all the conveying rollers 23 to rotate.

[0041] The conveying fence 22 is slidably connected to the conveying frame 21 along the longitudinal direction Y to divide the conveying roller 23 into two sections in the longitudinal direction Y. The conveying fence 22 includes a conveying seat 221 and a conveying upright rod 222. The conveying seat 221 is slidably connected to the conveying frame 21 along the longitudinal direction Y and is located below the conveying roller 23. The conveying upright rod 222 is a plurality of conveying upright rods 222 arranged at intervals along the transverse direction X. Each conveying upright rod 222 is located in the gap between adjacent conveying rollers 23, and its bottom end is connected to the conveying seat 221, and its top end extends above the conveying roller 23.

[0042] The top end of the conveying upright rod 222 protrudes from the conveying roller 23. By using the upper half of multiple conveying upright rods 222, the space above the conveying roller 23 can be divided into two parts in the longitudinal direction Y. The conveying seat 221 slides relative to the conveying frame 21, so that the conveying bar 22 can be moved relative to the conveying frame 21 as a whole. In this embodiment, the conveying seat 221 includes a first position and a second position on the sliding track. When the conveying seat 221 is located at the first position, the conveying bar 22 is located at one end of the conveying roller 23, and a pile of PCBs with a larger longitudinal dimension Y can be conveyed by the conveying device 2 along the horizontal direction X. When the conveying seat 221 is located at the second position, the conveying bar 22 moves to the middle position of the conveying roller 23, and PCBs with a smaller width can be conveyed on both sides of the conveying bar 22 at the same time, thereby improving the conveying efficiency.

[0043] The conveying seat 221 is in the shape of a long strip arranged along the horizontal direction X, so as to simultaneously connect all the conveying uprights 222. A guide mechanism 26 is arranged between the conveying seat 221 and the conveying frame 21, and the guide mechanism 26 includes a sliding block and a guide rail that are slidably matched, the slider is fixed to the bottom end of the conveying seat 221, and the guide rail is fixed to the conveying frame 21. The guide mechanism 26 can be arranged in multiple groups and arranged along the horizontal direction X to improve the stability of the relative sliding between the conveying seat 221 and the conveying frame 21.

[0044] The conveying rod 222 is cylindrical to reduce the contact area with the edge of the PCB and avoid damage to the edge of the PCB. The conveying seat 221 is provided with a plurality of mounting holes (not shown in the figure), and the conveying rods 222 are arranged one by one corresponding to the mounting holes. The bottom ends of the conveying rods 222 are inserted into the mounting holes so as to facilitate the assembly connection between the plurality of conveying rods 222 and the conveying seat 221.

[0045] The conveying fence 22 also includes a conveying cross bar 223, which is arranged along the horizontal direction X. The top of each conveying vertical rod 222 is connected to the conveying cross bar 223. The conveying cross bar 223 can be used to connect the tops of all the conveying vertical rods 222 into a whole, thereby improving the stability of the entire conveying fence 22 structure.

[0046] In this embodiment, the two ends of the conveying rod 222 are respectively fixedly connected to the conveying cross bar 223 and the conveying seat 221, so as to simplify the structure and reduce the equipment cost. As another embodiment, the conveying rod 222 can also be rotatably connected to the conveying seat 221 and the conveying cross bar 223, and its rotation axis is its own axis, that is, the vertical direction Z. During the conveying process of the PCB, if the PCB contacts the conveying rod 222, the conveying rod 222 can rotate, so that the PCB and the conveying rod 222 are in rolling cooperation, reducing the wear of the conveying rod 222 on the PCB.

[0047] like Figure 5As shown, a positioning mechanism 27 for locking the positions of the two is provided between the conveying seat 221 and the conveying frame 21. In this embodiment, the positioning mechanism 27 includes a first positioning block 271, a second positioning block 272 and a positioning pin 273. The first positioning block 271 and the second positioning block 272 are arranged along the longitudinal direction Y and fixed to the end of the conveying frame 21 away from the frame 100 in the transverse direction X. The top surface of the first positioning block 271 is provided with a first positioning hole 274, the top surface of the second positioning block 272 is provided with a second positioning hole 275, and the conveying seat 221 is provided with a pin hole 227. The positioning pin 273 slides in the vertical direction Z and penetrates the pin hole 227. When the conveying fence 22 slides along the longitudinal direction Y, the pin hole 227 can be aligned with the first positioning hole 274 or the second positioning hole 275. When the conveying seat 221 is located at the first position, the pin hole 227 is aligned with the first positioning hole 274, and the bottom end of the positioning pin 273 is inserted into the first positioning hole 274, so that the conveying bar 22 is positioned at one end of the conveying roller 23. When the conveying seat 221 is located at the second position, the pin hole 227 is aligned with the second positioning hole 275, and the bottom end of the positioning pin 273 is inserted into the second positioning hole 275, and the conveying bar 22 is positioned at the middle position in the longitudinal direction Y of the conveying roller 23. Through the positioning mechanism 27, the conveying bar 22 can be positioned at two positions in the longitudinal direction Y, so as to facilitate positioning of the conveying bar 22 according to the size of the PCB to be conveyed.

[0048] like Figure 6 , Figure 7 As shown, the PCB loading device 1 includes a lifting module 11, a loading bar 12 and a lifting drive assembly 13 (see Fig. 9 ).like Figure 8 As shown, the lifting module 11 includes a lifting frame 111, a loading roller 112 and a loading motor 113. The loading rollers 112 are arranged in a plurality along the horizontal direction X at intervals. The axial direction of each loading roller 112 is the longitudinal direction Y, and is connected to the lifting frame 111 for rotation around its own axis. The loading motor 113 is arranged on the lifting frame 111 and is connected to the plurality of loading rollers 112 for driving the plurality of loading rollers 112 to rotate, thereby allowing the PCB to translate in the horizontal direction on the lifting module.

[0049] like Figure 6 , Figure 7 As shown, the loading fence 12 includes a loading seat 121 and a loading upright rod 122; the loading seat 121 is slidably connected to the frame 100 along the longitudinal direction Y and is located below the loading roller 112; there are multiple loading upright rods 122 arranged at intervals along the transverse direction X, and each loading upright rod 122 is located in the gap between adjacent loading rollers 112, and its bottom end is connected to the loading seat 121 and the top end extends to the top of the loading roller 112; the lifting drive assembly 13 is arranged on the frame 100 and connected to the lifting frame 111 to drive the lifting module 11 to move along the vertical direction Z.

[0050] The loading bar 12 has a similar function to the conveying bar 22 , and is used to divide the space above the loading roller 112 in the longitudinal direction Y. The user can move the loading bar 12 as needed to align the loading bar 12 with the conveying bar 22 .

[0051] The loading bar 12 has a first position and a second position on the longitudinal Y moving track. Figure 6 As shown, when the loading bar 12 is located at the first position, the loading bar 12 is located at one end of the loading roller 112; Figure 7 As shown, when the loading boom 12 is located at the second position, the loading boom 12 is located at the middle position of the loading roller 112 .

[0052] The loading bar 12 and the conveying bar 22 are detachably connected, and the fixed connection or separation between the two can be achieved through various detachable connection mechanisms. The detachable connection mechanism can be set between the loading seat 121 and the conveying seat 221. When the loading bar 12 is connected to the conveying bar 22, moving the conveying bar 22 can drive the loading bar 12 to move together, which is convenient for use. Here, as another embodiment, a positioning mechanism 27 for locking the positions of the loading seat 121 and the frame 100 can also be set between the loading seat 121 and the frame 100, so as to position the loading seat 121 at the same two positions as the conveying seat 221, without the need to set a detachable connection mechanism between the loading bar 12 and the conveying bar 22.

[0053] A guide mechanism in which a slide block and a guide rail cooperate with each other can also be provided between the loading seat 121 of the loading bar 12 and the frame 100 to ensure the stability of sliding between the loading bar 12 and the frame 100 .

[0054] The loading bar 12 also includes a loading cross bar 123, which is arranged along the horizontal direction X. The top of each loading vertical rod 122 is connected to the loading cross bar 123. The loading cross bar 123 can be used to connect the tops of all the loading vertical rods 122 to form a whole, so as to ensure the stability and reliability of the entire loading bar 12 structure.

[0055] In the utility model, the conveying bar moves as a whole relative to the conveying frame, and the loading bar moves as a whole relative to the lifting module, so that the space above the conveying roller and the loading roller can be divided. When the conveying bar and the loading bar are located at the end, only one row of larger PCBs can be conveyed. When the conveying bar and the loading bar are located in the middle position, smaller PCBs can be conveyed side by side on both sides of the conveying bar and the loading bar, thereby improving the conveying efficiency, and the conveying bar and the loading bar can be used to avoid contact between the PCBs on both sides. The lifting module can drive two piles of PCBs to gradually rise at the same time, so that the stacked PCBs on the loading roller can be close to the transfer device layer by layer, which is convenient for the transfer device to grab the two PCBs side by side at the top, and then convey them to the translation device. The translation device drives the two PCBs to translate and pass under the camera device. The camera device takes pictures of the two PCBs to achieve automatic appearance inspection of the PCBs. The two PCBs are inspected at the same time, which can effectively improve the efficiency.

[0056] like Figure 8 As shown, the lifting frame 111 includes a connecting plate 1111, a horizontal plate 1112, two side plates 1113 and two mounting strips 1114. The connecting plate 1111 is connected to the lifting drive assembly 13 so as to be lifted and lowered under the drive of the lifting drive assembly 13, thereby making the entire lifting frame 111 move up and down. The two side plates 1113 are parallel to each other and are respectively connected to the two ends of the connecting plate 1111 in the longitudinal direction Y; each side plate 1113 has a relative connecting end and a suspended end in the transverse direction X, and the connecting end is fixedly connected to the connecting plate 1111; in the vertical direction Z, the size of the connecting end is larger than the size of the suspended end, so as to improve the connection strength between the connecting end and the connecting plate 1111, reduce the weight of the suspended end, and improve the stability of the movement of the entire lifting frame 111.

[0057] The horizontal plate 1112 is arranged horizontally and fixed between the two side plates 1113 to improve the stability of the entire lifting frame 111 structure. A clearance bar hole is arranged on the horizontal plate 1112 at the position corresponding to the loading rod 122 to avoid the movement of the loading rod 122. The horizontal plate 1112 is located below the loading roller 112 to avoid affecting the conveying of the PCB by the loading roller 112.

[0058] The two mounting strips 1114 are respectively connected to the top of the two side panels 1113, and the two ends of each loading roller 112 are respectively rotatably connected to the two mounting strips 1114. The two mounting strips 1114 can be used to connect multiple loading rollers 112 into an integral module, which is convenient for overall disassembly and assembly.

[0059] A bearing 1121 is provided at the end of the feeding roller 112. The mounting strip 1114 includes a fixing strip 1115 and a closing strip 1116. The fixing strip 1115 is provided with a plurality of mounting grooves 1117, and the top of the mounting groove 1117 is open; the closing strip 1116 is fixed to the top of the fixing strip 1115 and closes the opening of the mounting groove 1117, and the bearing 1121 is limited in the mounting groove 1117. This structure can facilitate the rotational matching connection between the feeding roller 112 and the mounting strip 1114. During assembly, the bearing 1121 is installed into the mounting groove 1117 from the opening of the mounting groove 1117, and then the closing strip 1116 is fixed to the fixing strip 1115, so that the assembly connection between the feeding roller 112 and the mounting strip 1114 can be completed, and the structure is simple and the preparation cost is low.

[0060] The feeding motor 113 is fixed to the connection end of one side plate 1113 and is located between the two side plates 1113 to make full use of the space between the two side plates 1113. The output shaft of the feeding motor 113 passes through the side plate 1113 and is connected to the multiple feeding rollers 112 through the feeding transmission assembly 114. The feeding transmission assembly 114 and the feeding motor 113 are respectively arranged on both sides of the side plate 1113. A protective cover (not shown in the figure) is provided on the outer cover of the feeding transmission assembly 114 to prevent other structures from affecting the transmission structure of the feeding transmission assembly.

[0061] In this embodiment, the feeding transmission assembly 114 includes a plurality of synchronous chain assemblies, and two adjacent feeding rollers 112 are connected by the synchronous chain assembly to achieve synchronous rotation between the plurality of feeding rollers 112. The feeding motor 113 is connected to one or two feeding rollers 112 through the transmission chain assembly to drive all the feeding rollers 112 to rotate.

[0062] like Fig. 9 As shown, the rack 100 includes a loading rack 14, and the loading rack 14 can be used to connect the various components of the PCB loading device 1 into an integral module. The loading rack 14 includes a back plate 141, a bottom plate 142, a top plate 143 and a baffle 144. The back plate 141 and the baffle 144 are both vertically arranged, and the back plate 141 is used to be fixedly connected with other structural members of the rack 100 to provide support for the entire PCB loading device 1. The bottom plate 142 and the top plate 143 are horizontally arranged and are both located on the same side of the back plate 141. The bottom surface of the bottom plate 142 is fixed to the bottom end of the back plate 141 through a reinforcing plate 145. The reinforcing plate 145 can be used to support the bottom of the bottom plate 142 to improve the structural strength. There are two reinforcing plates 145, which are respectively connected to the two ends of the bottom plate 142 in the longitudinal direction. The loading seat 121 is slidably connected to the top surface of the bottom plate 142 , and the bottom plate 142 can be used to facilitate the sliding fit between the loading seat 121 and the frame 100 .

[0063] The top plate 143 is fixed to the top of the back plate 141. The baffle 144 is fixedly connected to the top plate 143 and extends downward to the bottom plate 142. The lifting drive assembly 13 is arranged between the baffle 144 and the back plate 141 to prevent other structures from interfering with the operation of the lifting drive assembly 13 and ensure operational reliability. The baffle 144 can be used to isolate the feeding roller 112 from the lifting drive assembly 13. The lifting drive assembly 13 is located on one side of the lifting module 11 in the horizontal direction X, and the structural layout is reasonable, which does not affect the transmission between the feeding motor 113 and the feeding roller 112.

[0064] The connecting plate 1111 is located between the lifting drive assembly 13 and the baffle 144, and its two ends in the longitudinal direction Y protrude from the baffle 144 to facilitate the connection between the connecting plate 1111 and the two side plates 1113, and to facilitate the connection between the connecting plate 1111 and the lifting drive assembly 13. In this embodiment, the lifting drive assembly 13 is a combination of a motor and a ball screw mechanism, and two sets of guide rails and a guide mechanism of a slider are set between the connecting plate 1111 and the back plate 141 to ensure the stability of the lifting module moving along the vertical Z direction.

[0065] like Figure 6 , Figure 7 and Figure 8 As shown, the lifting module 11 is provided with a first sensor 191 and a second sensor 192, which are arranged in the horizontal direction X, and the first sensor 191 is located in front of the second sensor 192, that is, the first sensor 191 is close to the baffle 144 relative to the second sensor 192, and the first sensor 191 is located on the side of all the loading rollers 112 away from the conveying device 2. It can be understood that in this embodiment, the front and the back refer to the conveying direction of the PCB on the conveying device 2 and the PCB loading device 1, from the conveying device 2 to the PCB loading device 1 is the front, and from the PCB loading device 1 to the conveying device 2 is the back.

[0066] The first sensor 191 and the second sensor 192 are both used to sense the front end position of the PCB. The first sensor 191 can limit the end position of the PCB conveyed forward to prevent the PCB from colliding with the baffle 144. When the front end position of the PCB moves to the first sensor 191, the feeding motor 113 stops running to position the front end of the PCB at the first sensor 191.

[0067] The second sensor 192 is used to adjust the conveying speed of the PCB on the feeding roller 112. The number of feeding rollers 112 between the second sensor 192 and the first sensor 191 is less than the number of feeding rollers 112 on the side of the second sensor 192 away from the first sensor 191. In this embodiment, three feeding rollers 112 are arranged between the first sensor 191 and the second sensor 192, and about 13 feeding rollers are arranged on the other side of the second sensor. When the front end of the PCB moves to the second sensor 192, that is, it is detected that the PCB is about to reach the end position of the first sensor 191, the feeding motor 113 decelerates, so that the PCB moves to the first sensor 191 at a slower speed, so as to avoid the PCB moving too fast and being unable to stop immediately at the first sensor 191. The PCB can be conveyed at a faster speed before reaching the second sensor 192, thereby improving efficiency. At the same time, the second sensor 192 can also be used to detect whether all the PCBs above the feeding roller 112 have been taken away.

[0068] There are two first sensors 191 and two second sensors 192, the two first sensors 191 are arranged along the longitudinal direction Y, and the two second sensors 192 are arranged along the longitudinal direction Y. When the loading bar 12 is located at the middle position of the loading roller 112, the two first sensors 191 are respectively located on both sides of the loading bar 12, and the two second sensors 192 are respectively located on both sides of the loading bar 12, so as to detect two piles of PCBs.

[0069] In this embodiment, the first sensor 191 and the second sensor 192 are both disposed on the top surface of the transverse plate 1112 to facilitate assembly of the two.

[0070] like Figure 2 As shown, the transfer device 3 includes a longitudinal moving component 31, a lifting component 32, and a grabbing component 33. The grabbing component 33 is located directly above the lifting module 11, and is provided with a plurality of suction nozzles for grabbing the PCB at the top of the loading roller 112; the lifting component 32 is connected to the grabbing component 33, and is used to drive the grabbing component 33 to move up and down, so as to make the grabbing component 33 close to or away from the lifting module 11. The longitudinal moving component 31 is provided on the frame 100, and is connected to the lifting component 32, so as to drive the lifting component 32 to move along the longitudinal direction Y, so that the grabbing component 33 moves between the upper part of the lifting module 11 and the upper part of the translation device 4, thereby moving the PCB to the translation device 4.

[0071] Combination Figure 1 and Figure 2As shown, the translation device 4 is located on one side of the longitudinal direction Y of the PCB feeding device 1, and is arranged along the transverse direction X, and is used to convey the PCB along the transverse direction X. In this embodiment, the translation device 4 includes a first translation device, a second translation device and a third translation device, and the first translation device, the second translation device and the third translation device are arranged in sequence along the transverse direction X, and the upper surfaces of the three are flush, so as to convey the PCB. In this embodiment, the first translation device is a conveyor belt mechanism, and a plurality of buffer holes are arranged on the conveyor belt to prevent the PCB from drifting when it is placed thereon. The second translation device is a conveyor belt mechanism, which is used to make the PCB pass through a dust removal and static electricity removal device. The third translation device is a conveyor belt mechanism, and the camera device is located above the third translation device, which is used to shoot the PCB on the third translation device.

[0072] like Figure 1 As shown, in this embodiment, the PCB automatic appearance inspection equipment further includes a feeding device 6, a feeding platform 7, and a discharge conveying device 8. The feeding platform 7 is arranged on the frame 100, and is located on the same side of the translation device 4 as the PCB loading device 1, and the two are arranged along the horizontal X. The feeding device 6 is arranged on the frame 100, and is used to move the PCB after inspection to the feeding platform 7. The structure of the feeding device 6 can be the same as that of the transfer device 3, and the structure of the feeding platform 7 can be the same as that of the PCB loading device 1. The discharge conveying device 8 is a conveyor belt structure, which is used to convey the PCB on the feeding platform 7.

[0073] In the above embodiment, a plurality of feeding uprights are arranged along the same horizontal straight line X. As another embodiment, such as in the second embodiment of the present utility model, Fig.10 As shown, when the loading rods 122 are all rotatably connected to the loading seat 121, the multiple loading rods 122 are divided into multiple first loading rods 122a and multiple second loading rods 122b, and the first loading rods 122a and the second loading rods 122b are staggered in the longitudinal direction Y, and the two are alternately arranged on the loading seat 121 in the transverse direction X, so that the first loading rods 122a and the second loading rods 122b are respectively located at both sides of the loading bar 12. When the loading bar 12 is located in the middle position of the loading roller 112 to transport two piles of PCBs side by side, a pile of PCBs located on one side of the loading bar 12 can only contact with the first loading rod 122a, but not with the second loading rod 122b; another pile of PCBs located on the other side of the loading bar 12 can only contact with the second loading rod 122b, but not with the first loading rod 122a. When two piles of PCBs are transported side by side, the first loading rod 122a and the second loading rod 122b rotate in opposite directions, so that there is rolling friction between all the loading rods and the PCBs without affecting each other.

[0074] The plurality of conveying uprights 222 can be arranged in the same manner as the plurality of loading uprights 122. When the conveying uprights are all rotatably connected to the conveying seat, the plurality of conveying uprights are divided into a plurality of first conveying uprights and a plurality of second conveying uprights, the first conveying uprights and the second conveying uprights are staggered in the longitudinal direction Y, and the two are alternately arranged in the transverse direction X on the conveying seat 221, so that the first conveying uprights and the second conveying uprights are respectively located at both sides of the conveying bar 22, when the conveying bar 22 is located in the middle position of the conveying roller 23, so that when two piles of PCBs are conveyed side by side, one pile of PCBs located on one side of the conveying bar 22 can only contact with the first conveying uprights, but not with the second conveying uprights; another pile of PCBs located on the other side of the conveying bar 22 can only contact with the second conveying uprights, but not with the first conveying uprights. When conveying two piles of PCBs side by side, the first conveying uprights and the second conveying uprights rotate in opposite directions, so that all the conveying uprights 222 and the PCBs are in rolling friction and will not affect each other.

[0075] The other structures in this embodiment may be the same as those in the first embodiment and will not be described in detail here.

[0076] like Fig.11 and 12 As shown, in the third embodiment of the utility model, a loading longitudinal rod 125 is arranged on one side of the loading vertical rod 122, and the loading longitudinal rod 125 is horizontally arranged along the longitudinal direction Y, and its top surface is horizontally aligned with the top surface of the conveying roller 23. The diameter of the loading longitudinal rod 125 is smaller than the gap between adjacent loading rollers 112, and one end of the loading longitudinal rod 125 is rotatably connected to the loading vertical rod 122. When the loading vertical rod 122 is located at one end of the loading roller 112, the other end of the loading longitudinal rod 125 is located at the middle position of the loading roller 112, so that the loading longitudinal rod 125 will not affect the sliding of the loading fence 12.

[0077] When the loading bar 12 is located in the middle of the loading roller 112 and PCBs are transported on both sides of the loading bar 12 at the same time, the loading longitudinal rod 125 cooperates with the up and down movement of the lifting module 11 to adjust the end positions of the two piles of PCBs on both sides of the conveying bar 22 so that the two piles are aligned.

[0078] When the PCB is normally transported, when the lifting module 11 is located at the normal transport position, the top surfaces of the loading roller 112, the transport roller 23, and the loading longitudinal rod 125 are horizontally aligned. When the PCB is moved from the lifting module 11 to the translation device 4, the lifting module 11 is located at the feeding position, and the top surface of the loading roller 112 is higher than the top surface of the loading longitudinal rod 125.

[0079] When the front ends of the two piles of PCBs on both sides of the loading bar 12 are not aligned, the lifting module 11 moves down to the separation position, where the top surface of the loading roller 112 is lower than the top surface of the loading longitudinal rod 125, and the vertical Z distance between the two is less than the thickness of the PCB, and the loading roller 112 is separated from the PCBs on the loading longitudinal rod 125, so that the loading roller 112 only drives the PCB on the other side to move, so as to achieve the purpose of aligning the two piles of PCBs. The specific description is as follows.

[0080] The side of the loading bar 12 provided with the loading longitudinal rod 125 is the first side, and the other side is the second side. When the front end of the PCB on the first side is closer to the front end of the PCB on the second side, the PCB on the first side is first completely moved onto the loading roller 112, that is, the PCB on the first side is separated from the conveying roller 23. At this time, the PCB on the first side can contact both the loading roller 112 and the loading longitudinal rod 125. Here, the front end of the PCB on the first side can be moved to the first sensor 191 on the same side; then the loading lifting module 11 is driven by the loading lifting drive assembly 13 to move downward to the separation position, and the loading roller 112 moves downward and is separated from the PCB on the first side. At this time, the rotation of the loading roller 112 and the conveying roller 23 will not drive the first pile of PCBs to move, but can only drive the second pile of PCBs to move. The distance between the top surface of the loading roller 112 and the top surface of the loading longitudinal rod 125 in the vertical direction Z is less than the thickness of the PCB. The second pile of PCBs can still contact the loading roller 112 and the conveying roller 23 during the forward movement, and can thus move forward driven by the loading roller 112 and the conveying roller 23. When the second pile of PCBs moves forward to the front end and is aligned with the front end of the first pile of PCBs, the loading roller 112 stops rotating, and the front ends of the two piles of PCBs can be aligned. Here, the front end of the PCB on the second side can be moved to the first sensor 191 on the same side, so that the PCBs on both sides can be aligned. After alignment, the loading lifting module 11 can move upward, the loading roller 112 contacts the first pile of PCBs again, and drives both piles of PCBs to move upward for loading.

[0081] When the front end of the PCB on the first side is relatively backward relative to the front end of the PCB on the second side, the PCB on the second side is first completely moved onto the loading roller 112 and separated from the conveying roller 23. Here, the front end of the PCB on the second side can be moved to the first sensor 191 on the same side. Then, the loading and lifting module 11 is driven by the loading and lifting drive assembly 13 to move downward to the separation position, the loading roller 112 moves downward and separates from the PCB on the first side, the loading roller 112 does not rotate, only the conveying roller 23 rotates, and the conveying roller 23 can drive the PCB on the first side to move forward until the PCB on the first side is just separated from the top surface of the conveying roller 23 closest to the loading roller 112, and the conveying roller 23 cannot apply force to the PCB on the first side, and the conveying roller 23 stops rotating. The loading roller 112 rotates in the opposite direction to drive the PCB on the second side to move backward until the rear end of the PCB on the second side abuts against the conveying roller 23. The loading roller 112 moves upward to be flush with the loading longitudinal rod 125, and the loading roller 112 drives the PCBs on both sides to move forward to the first sensor 191. This method is suitable for situations where there is a large gap between the PCBs on both sides.

[0082] If the gap between the two PCBs is small and smaller than the distance from the first sensor 191 to the baffle 144, the loading roller 112 can be used to move the front end of the first PCB to the first sensor 191. At this time, although the front end of the second PCB exceeds the first sensor 191, it will not contact the baffle 144. The loading lifting module 11 moves downward to the separation position driven by the loading lifting drive assembly 13, and the loading roller 112 separates from the first PCB. Its reverse rotation causes the second PCB to move backward until the front end of the second PCB moves to the first sensor 191.

[0083] In this way, the front ends of the PCBs on both sides can be roughly aligned to facilitate subsequent detection, while preventing the front end of one PCB from moving to the first sensor 191 while the other PCB is still on the conveying device 2 or between the conveying roller 23 and the loading roller 112, affecting the upward movement of the lifting module 11.

[0084] A loading oblique rod 126 is fixed on the loading seat 121, and the other end of the loading longitudinal rod 125 is rotatably connected to the loading oblique rod 126, so that the loading longitudinal rod 125, the loading vertical rod 122, and the loading oblique rod 126 are connected to form a triangle to improve the stability of the loading longitudinal rod 125 when supporting the PCB alone.

[0085] Furthermore, the loading rod can include a coaxially arranged lower rod and an upper rod, the bottom end of the lower rod is fixedly connected to the loading seat, the loading longitudinal rod 125 is rotatably connected to one side of the top end of the lower rod, the top end of the lower rod is rotatably connected to the bottom end of the upper rod, and the upper rod is rotatably connected to the loading cross rod. Dividing the loading rod into two sections can facilitate the connection with the loading longitudinal rod 125, and the second conveying rod itself can also rotate.

[0086] The structure of the loading longitudinal rod 125 in this embodiment is not only applicable to the first embodiment, but also to the second embodiment.

[0087] In summary, although the present invention has been disclosed as above in terms of preferred embodiments, the above preferred embodiments are not intended to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A PCB feeding device, characterized in that: The PCB loading device is arranged on the frame, and the PCB loading device includes a lifting module, a loading bar and a lifting drive assembly; the lifting module includes a lifting frame, a loading roller and a loading motor, the loading roller is a plurality of loading rollers arranged at intervals along the horizontal direction, the axial direction of each loading roller is longitudinal, and is connected to the lifting frame around its own axial direction, and the loading motor is arranged on the lifting frame and is drivingly connected to the plurality of loading rollers; the loading bar includes a loading seat and a loading vertical rod; the loading seat is connected to the frame in a longitudinal sliding manner and is located below the loading roller; the loading vertical rod is a plurality of loading vertical rods arranged at intervals along the horizontal direction, and each loading vertical rod is located in the gap between adjacent loading rollers, and its bottom end is connected to the loading seat and the top end extends above the loading roller; the lifting drive assembly is arranged on the frame and connected to the lifting frame to drive the lifting module to move vertically.

2. The PCB feeding device according to claim 1, characterized in that: The feeding bar also includes a feeding cross bar, which is arranged in the transverse direction, and the top end of each feeding vertical rod is connected to the feeding cross bar.

3. The PCB feeding device according to claim 1, characterized in that: The lifting frame includes a connecting plate, a cross plate, two side plates and two mounting strips; the connecting plate is connected to the lifting drive assembly so as to be lifted and lowered under the drive of the lifting drive assembly; the two side plates are parallel to each other and are respectively connected to the connecting plate at both ends in the longitudinal direction; each side plate has a connecting end and a suspended end opposite to each other in the transverse direction, and the connecting end is fixedly connected to the connecting plate; in the vertical direction, the size of the connecting end is larger than the size of the suspended end; the cross plate is horizontally arranged and fixed between the two side plates, and the cross plate is located below the feeding roller, and a clearance bar hole is arranged on the cross plate at a position corresponding to the feeding vertical rod, and the two mounting strips are respectively connected to the top of the two side plates, and the two ends of each feeding roller are rotatably connected to the two mounting strips.

4. The PCB feeding device according to claim 3, characterized in that: A bearing is provided at the end of the feeding roller; the mounting strip includes a fixing strip and a closing strip, the fixing strip is provided with a plurality of mounting grooves, and the top of the mounting groove is open; the closing strip is fixed to the top of the fixing strip and closes the opening of the mounting groove, and the bearing is limited in the mounting groove.

5. The PCB feeding device according to claim 3, characterized in that: The frame includes a loading rack, which includes a back plate, a bottom plate, a top plate and a baffle plate. The back plate and the baffle plate are both vertically arranged, the bottom plate and the top plate are horizontally arranged, and are both located on the same side of the back plate. The bottom surface of the bottom plate is fixed to the bottom end of the back plate through a reinforcing plate, and the loading seat is slidably connected to the top surface of the bottom plate; the top plate is fixed to the top end of the back plate, and the baffle plate is fixedly connected to the top plate and extends downward to the bottom plate; the lifting drive assembly is arranged between the baffle plate and the back plate, and the connecting plate is located between the lifting drive assembly and the baffle plate, and its longitudinal ends protrude from the baffle plate.

6. The PCB feeding device according to any one of claims 1 to 5, characterized in that: The lifting module is provided with a first sensor and a second sensor, the first sensor and the second sensor are arranged in a transverse direction, and are both used to sense the front end position of the PCB; The first sensor is located in front of the second sensor and is used to limit the end position of the PCB conveyed forward. When the front end of the PCB moves to the first sensor, the feeding motor stops running. The number of the feeding rollers between the second sensor and the first sensor is less than the number of the feeding rollers on the side of the second sensor away from the first sensor; when the front end of the PCB moves to the second sensor, the feeding motor slows down.

7. The PCB feeding device according to any one of claims 1 to 5, characterized in that: The loading upright rod is rotatably connected to the loading seat.

8. The PCB feeding device according to claim 7, characterized in that: The plurality of loading uprights are divided into a plurality of first loading uprights and a plurality of second loading uprights. The first loading uprights and the second loading uprights are staggered in the longitudinal direction and are alternately arranged on the loading seat in the transverse direction.

9. The PCB feeding device according to any one of claims 1 to 5, characterized in that: A loading longitudinal rod is arranged on one side of the loading vertical rod, and the loading longitudinal rod is arranged horizontally in the longitudinal direction, and the diameter of the loading longitudinal rod is smaller than the gap between the adjacent loading rollers, and one end of the loading longitudinal rod is rotatably connected to the loading vertical rod, and when the loading vertical rod is located at one end of the loading roller, the other end of the loading longitudinal rod is located at the middle position of the loading roller; When the lifting module moves down to the separation position, the top surface of the feeding roller is lower than the top surface of the feeding longitudinal rod, and the vertical distance between the two is less than the thickness of the PCB, and the feeding roller is separated from the PCB on the feeding longitudinal rod.

10. A PCB automatic appearance inspection device, characterized in that: It comprises a conveying device, a frame, and a PCB feeding device according to any one of claims 1 to 9; The conveying device comprises a conveying frame, a conveying fence, a conveying roller and a conveying motor. The conveying rollers are arranged in a plurality at intervals along the transverse direction. The axial direction of each conveying roller is longitudinal and is connected to the conveying frame by rotation around its own axial direction. The conveying motor is arranged on the conveying frame and is connected to the plurality of conveying rollers by transmission. The conveying fence comprises a conveying seat and a conveying upright rod. The conveying seat is connected to the conveying frame by sliding along the longitudinal direction and is located below the conveying roller. The conveying upright rods are arranged in a plurality at intervals along the transverse direction. Each conveying upright rod is located in the gap between adjacent conveying rollers, and its bottom end is connected to the conveying seat and its top end extends above the conveying roller. The loading bar of the PCB loading device is detachably connected to the conveying bar.

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