Assembly device for circuit board

Abstract

The invention discloses an assembling device for a circuit board, and the device comprises a suction assembly and an anti-falling mechanism, the suction assembly is provided with a suction cup, and at least the suction cup is movably disposed between a to-be-assembled substrate and a bearing box for placing an electronic element; the anti-falling mechanism is connected with the suction assembly, the state of a bearing structure of the anti-falling mechanism is adjustable, the bearing structure has the working state that the bearing structure is opened to the bottom area of the suction cup so as to bear the electronic element falling off from the suction cup, and the bearing structure has the storage state that the bearing structure retreats from the bottom area of the suction cup. The problems that when an air pump or an air pipe breaks down, pneumatic adsorption force can be suddenly weakened or disappear, so that an adsorbed electronic element falls off, and once the electronic element falls off, the element is possibly damaged, a circuit board below the element is possibly damaged, and greater economic loss and production delay are caused are solved. And the technical effect of effectively receiving the electronic components is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of circuit board assembly systems, and in particular to an assembly device for circuit boards. Background Art

[0002] In the existing PCBA (Printed Circuit Board Assembly, PCBA for short) assembly process, especially in the field of automated assembly, pneumatic adsorption is widely used to grab and place electronic components. This technology usually relies on a precise pneumatic system, including an air pump, air pipe and suction cup. The air pump draws vacuum to make the suction cup generate enough negative pressure to adsorb the electronic components, and then locate and place them at the specified position on the PCBA board.

[0003] However, this technology has a significant flaw: when pneumatic components such as air pumps or air pipes fail, the pneumatic adsorption force will suddenly weaken or disappear, causing the electronic components being adsorbed to fall. Once the electronic components fall, it may not only cause damage to the components themselves, but also damage the PCBA board underneath, causing greater economic losses and production delays. Summary of the invention

[0004] The present application provides an assembly device for circuit boards to at least solve the problem in the related art that when an air pump or air pipe fails, the pneumatic adsorption force will suddenly weaken or disappear, causing the electronic components being adsorbed to fall off. Once the electronic components fall off, not only may the components themselves be damaged, but the circuit boards underneath may also be damaged, causing greater economic losses and production delays.

[0005] The present application provides an assembly device for circuit boards, including a suction component and an anti-drop mechanism, wherein the suction component has a suction cup, and at least the suction cup is movably arranged between a substrate to be assembled and a carrier box for placing electronic components, so as to suck the electronic components through the suction cup and place them at a preset position of the substrate to be assembled; the anti-drop mechanism is connected to the suction component, and the anti-drop mechanism has a receiving structure, the state of the receiving structure is adjustably arranged, the receiving structure has a working state of opening to the bottom area of ​​the suction cup to receive the electronic components falling off the suction cup, and the receiving structure has a storage state of exiting the bottom area of ​​the suction cup.

[0006] In an exemplary embodiment, the anti-drop mechanism is detachably connected to the suction assembly.

[0007] In an exemplary embodiment, the receiving structure is expanded in a horizontal direction, and the receiving structure is retracted in a horizontal direction.

[0008] In an exemplary embodiment, when the receiving structure is in a working state, the projection of the receiving structure in its moving direction is in a horizontal C-shape.

[0009] In an exemplary embodiment, the suction assembly includes a support plate, and the suction cup is movably connected to the support plate through a ventilation duct; the anti-drop mechanism includes two side plates, the two side plates are respectively located on the radial sides of the suction cup, and the two side plates are connected to the support plate; the two ends of the supporting structure are respectively connected to the two side plates, and at least one end of the supporting structure is connected to the corresponding side plate through a traction assembly, so as to pull the supporting structure through the traction assembly and open it from a storage state to a working state.

[0010] In an exemplary embodiment, the two ends of the supporting structure are respectively a fixed end and a movable end, the fixed end is fastened to the first side plate, the side of the movable end facing away from the fixed end is connected to the traction assembly, and the traction assembly is connected to the second side plate; the anti-drop mechanism also includes a rebound structure, the first end of the rebound structure is fastened to the first side plate, and the second end of the rebound structure is connected to the movable end, so that the supporting structure can be pulled back from the working state to the storage state when the rebound force of the rebound structure is greater than the traction force of the traction assembly.

[0011] In an exemplary embodiment, the traction assembly includes a transmission rod, a traction rope and a first driving unit, wherein the transmission rod is rotatably inserted into the second side plate, and the axial ends of the transmission rod respectively pass through the two side surfaces of the second side plate; the first end of the traction rope is connected to the movable end, and the second end of the traction rope is wound around the transmission rod; the first driving unit is connected to the second side plate, and the first driving unit is drivingly connected to the transmission rod through the first transmission mechanism.

[0012] In an exemplary embodiment, the first transmission mechanism includes a first gear structure, a second gear structure and a transmission toothed belt, wherein the first gear structure is sleeved on the driving shaft of the first driving part; the second gear structure is sleeved on the outer peripheral side of the transmission rod; and the transmission toothed belt is wound around the first gear structure and the second gear structure to make the first gear structure and the second gear structure rotate synchronously.

[0013] In an exemplary embodiment, there are two transmission rods, which are arranged in parallel in the lifting direction of the suction cup, and are connected by a transmission belt. A traction rope is wound on both axial ends of each transmission rod.

[0014] In an exemplary embodiment, an avoidance hole is opened on the support plate, the first end of the ventilation duct is connected to the air source, the second end of the ventilation duct passes through the avoidance hole and is connected to the suction cup, and the ventilation duct is slidably arranged along the axial direction of the avoidance hole so that the suction cup can be raised and lowered.

[0015] In an exemplary embodiment, the suction assembly also includes a connecting plate, a bracket structure and a second driving part, wherein the connecting plate is connected to the ventilation duct located on the side of the support plate away from the suction cup; the bracket structure is arranged on the side surface of the support plate away from the suction cup; the fixed part of the second driving part is connected to the bracket structure, and the movable part of the second driving part is connected to the connecting plate, so as to drive the suction cup located at the end of the ventilation duct to rise and fall through the connecting plate.

[0016] In an exemplary embodiment, the ventilation duct includes a main air pipe, a first branch air pipe, a second branch air pipe and a control module, wherein the main air pipe can be slidably penetrated on the support plate, and the main air pipe is connected to the connecting plate, and the end of the main air pipe away from the connecting plate is connected to the suction cup; the first end of the first branch air pipe is connected to the main air pipe, and the second end of the first branch air pipe is connected to the air source; the first end of the second branch air pipe is connected to the main air pipe, and the second end of the second branch air pipe is connected to the air source, so that the second branch air pipe is arranged in parallel with the first branch air pipe; wherein the main air pipe, the first branch air pipe, and the second branch air pipe are respectively provided with a first air pressure sensor, a second air pressure sensor, and a third air pressure sensor, and the first branch air pipe and the second branch air pipe are respectively provided with a first solenoid valve and a second solenoid valve; the first air pressure sensor, the second air pressure sensor, and the third air pressure sensor are all connected to the control module, and the control module is at least controlled and connected to the first solenoid valve, the second solenoid valve, and the first drive unit.

[0017] In an exemplary embodiment, when the second air pressure sensor detects that the real-time air pressure value in the first branch air pipe is lower than the preset air pressure value, the control module controls the second solenoid valve to open so that the second branch air pipe is connected to the air source, and after a first preset time, the control module controls the first solenoid valve to close; when the first air pressure sensor detects that the real-time air pressure value in the main air pipe is within a normal range, and the third air pressure sensor detects that the real-time air pressure value in the second branch air pipe is within a normal range, the suction cup continues to grab the electronic components.

[0018] In an exemplary embodiment, under the premise that the first solenoid valve is in a closed state and the second solenoid valve is in an open state, when the real-time air pressure value in at least one of the main air pipe and the second branch air pipe is lower than the preset air pressure value, the control module controls the first drive unit to start so that the receiving structure switches to a working state, and after a second preset time, the control module controls the second solenoid valve to close; or, when the first air pressure sensor detects that the real-time air pressure value in the main air pipe is lower than the preset air pressure value, the control module controls the first drive unit to start so that the receiving structure switches to a working state, and closes the first solenoid valve within a second preset time; or, when the first air pressure sensor detects that the real-time air pressure value in the main air pipe is lower than the preset air pressure value, the control module controls the first drive unit to start so that the receiving structure switches to a working state, and closes the second solenoid valve within a second preset time.

[0019] In an exemplary embodiment, a first air pump and a second air pump are respectively arranged on a first branch air pipe and a second branch air pipe. A first solenoid valve is located between the first air pump and an air source, and a second solenoid valve is located between the second air pump and the air source.

[0020] In an exemplary embodiment, the assembling device further includes an alarm module. The control module is controllably connected to the alarm module. When the control module controls the first driving part to start, it synchronously controls the alarm module to issue an alarm to prompt the staff that an electronic component has fallen.

[0021] In an exemplary embodiment, a tension sensor is arranged on the elastic return structure to detect the tension received by the elastic return structure. When the transmission rod winds up the traction rope to stretch the elastic return structure, the tension signal obtained by the tension sensor is a normal signal; after the electronic component falls on the receiving structure, the elastic return structure generates a pulling force and toggles. And when the tension received by the elastic return structure becomes smaller after exceeding a preset tension value, it indicates that the electronic component that has fallen on the receiving structure has been taken away. The control module controls the first driving part to rotate reversely after a third preset time period, so that the transmission rod rotates reversely and unwinds the receiving structure. At the same time, the elastic return structure pulls the receiving structure back to the storage state.

[0022] In an exemplary embodiment, the assembling device further includes an assembling frame. The assembling frame has an operation space. The substrate to be assembled and the carrier box are both located in the operation space. The suction assembly is movably arranged in the operation space; or, a camera is arranged on at least one side wall surface of the operation space.

[0023] Through the present application, an assembling device for a circuit board is provided, including a suction assembly and an anti-drop mechanism. Since the assembling device provided by the present application has an anti-drop mechanism, and the state of the receiving structure of the anti-drop mechanism is adjustable. Specifically, the receiving structure has a working state of opening to the bottom area of the suction cup, so as to receive the electronic component that has fallen off the suction cup, prevent the adsorbed electronic component from falling, ensure the integrity and safety of the electronic component itself, and can also ensure that the substrate to be assembled is not damaged, so as to ensure the integrity of the substrate to be assembled and prevent greater economic losses and production delays; in addition, the receiving structure also has a storage state of withdrawing from the bottom area of the suction cup, so as to play a role in avoiding the suction cup and ensure the adsorption and placement reliability of the suction cup for the electronic component. Description of the Drawings

[0024] In order to more clearly illustrate the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 A schematic diagram of the internal structure of an assembly device provided in an embodiment of the present application;

[0026] Figure 2 for Figure 1 A schematic diagram of the structure of the suction component and the anti-drop mechanism of the assembly device;

[0027] Figure 3 for Figure 2 A schematic diagram of the structure of the anti-drop mechanism and part of the suction components;

[0028] Figure 4 for Figure 3 Schematic diagram of the enlarged structure at A in FIG.

[0029] Figure 5 for Figure 3 Schematic diagram of the enlarged structure at B in FIG.

[0030] Figure 6 for Figure 3 Schematic diagram of the enlarged structure at C in FIG.

[0031] The above drawings include the following reference numerals:

[0032] 1. Substrate to be assembled; 2. Carrying box; 201. Partition; 3. Electronic components;

[0033] 10. Suction assembly; 11. Suction cup; 12. Support plate; 13. Ventilation duct; 131. Main air pipe; 1311. First air pressure sensor; 132. First branch air pipe; 1321. Second air pressure sensor; 1322. First solenoid valve; 1323. First air pump; 133. Second branch air pipe; 1331. Third air pressure sensor; 1332. Second solenoid valve; 1333. Second air pump; 14. Connecting plate; 15. Bracket structure; 16. Second driving unit;

[0034] 20. Anti-drop mechanism; 21. Undertaking structure; 22. Side plate; 23. Traction assembly; 231. Transmission rod; 232. Traction rope; 233. First driving part; 2331. Driving shaft; 234. First transmission mechanism; 2341. First gear structure; 2342. Second gear structure; 2343. Transmission toothed belt; 24. Rebound structure; 25. Transmission belt; 26. Air source;

[0035] 30. Assembly rack; 31. Operation space;

[0036] 40. Camera; 50. Three-axis module;

[0037] 60. Positioning assembly; 61. Positioning column; 62. Positioning spring. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0039] It should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. The terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. The terms "parallel", "perpendicular", and "equal" include the described situations and situations similar to the described situations, and the range of the similar situations is within the acceptable deviation range, where the acceptable deviation range is determined by those of ordinary skill in the art considering the measurements being discussed and the errors associated with the measurements of specific quantities (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallel and approximate parallel, where the acceptable deviation range of approximate parallel can be, for example, within 5° deviation; "perpendicular" includes absolute perpendicular and approximate perpendicular, where the acceptable deviation range of approximate perpendicular can also be, for example, within 5° deviation. "Equal" includes absolute equality and approximate equality, where the acceptable deviation range of approximate equality can be, for example, that the difference between the two equal ones is less than or equal to 5% of any one of them. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0040] In order to enable those skilled in the art of the present technology to better understand the solution of the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] The embodiments of the present application provide an assembling device for a circuit board. In combination with the structure and working principle of the assembling device, the device will be described in detail (technical terms involved must be explained).

[0042] As Figures 1 to 6As shown in the figure, the assembly device for a circuit board includes a suction component 10 and a falling prevention mechanism 20. Among them, the suction component 10 has a suction cup 11. At least the suction cup 11 is movably arranged between the substrate 1 to be assembled and the carrier box 2 for placing electronic components 3, so as to suck the electronic components 3 through the suction cup 11 and place them at the preset positions of the substrate 1 to be assembled; the falling prevention mechanism 20 is connected to the suction component 10, and the falling prevention mechanism 20 has a receiving structure 21. The state of the receiving structure 21 is adjustable. The receiving structure 21 has a working state of opening to the bottom area of the suction cup 11 to receive the electronic components 3 falling off the suction cup 11, and the receiving structure 21 has a storage state of withdrawing from the bottom area of the suction cup 11.

[0043] Through the present application, an assembly device for a circuit board is provided, including a suction component 10 and a falling prevention mechanism 20. Since the assembly device provided by the present application has a falling prevention mechanism 20, and the state of the receiving structure 21 of the falling prevention mechanism 20 is adjustable. Specifically, the receiving structure 21 has a working state of opening to the bottom area of the suction cup 11, so as to receive the electronic components 3 falling off the suction cup 11, prevent the adsorbed electronic components 3 from falling, ensure the integrity and safety of the electronic components 3 themselves, and also ensure that the substrate 1 to be assembled is not damaged, thus ensuring the integrity of the substrate 1 to be assembled and preventing greater economic losses and production delays; in addition, the receiving structure 21 also has a storage state of withdrawing from the bottom area of the suction cup 11, thus playing a role of avoiding the suction cup 11 and ensuring the adsorption and placement reliability of the suction cup 11 for the electronic components 3.

[0044] It should be noted that in the present application, the above-mentioned substrate 1 to be assembled is a circuit board, that is, a PCBA board.

[0045] It should be noted that in the present application, the falling prevention mechanism 20 is detachably connected to the suction component 10. In this way, the disassembly convenience between the falling prevention mechanism 20 and the suction component 10 is ensured.

[0046] In an exemplary embodiment, the falling prevention mechanism 20 and the suction component 10 are connected by a wedge block mortise and tenon joint.

[0047] It should be noted that in the present application, the receiving structure 21 opens horizontally, and the receiving structure 21 retracts horizontally. In this way, it is ensured that the receiving structure 21 in the working state can be in a horizontal state and effectively receive the electronic components 3, effectively preventing the electronic components 3 from falling.

[0048] Such as Figure 2 and Figure 3As shown, when the receiving structure 21 is in working state, the projection of the receiving structure 21 in its moving direction is in a horizontal C-shape. In this way, the horizontal C-shape can effectively receive the electronic component 3 and prevent the electronic component 3 from falling off the receiving structure 21.

[0049] like Figure 2 and Figure 3 As shown, the suction assembly 10 includes a support plate 12, and the suction cup 11 is movably connected to the support plate 12 through a ventilation pipe 13; the anti-drop mechanism 20 includes two side plates 22, which are respectively located on both radial sides of the suction cup 11, and the two side plates 22 are connected to the support plate 12; the two ends of the receiving structure 21 are respectively connected to the two side plates 22, and at least one end of the receiving structure 21 is connected to the corresponding side plate 22 through a traction assembly 23, so that the receiving structure 21 is pulled by the traction assembly 23 and opened from the storage state to the working state. In this way, the setting of the support plate 12 ensures the installation reliability of the suction assembly 10, and the receiving structure 21 of the anti-drop mechanism 20 is connected to the two side plates 22, and at least one end of the receiving structure 21 is connected to the corresponding side plate 22 through the traction assembly 23, so that the receiving structure 21 is pulled by the traction assembly 23 and opened from the storage state to the working state, ensuring the reliability and convenience of the state switching of the receiving structure 21.

[0050] like Figure 1 As shown, the assembly device further includes a three-axis module 50 , which is drivingly connected to the support plate 12 .

[0051] like Figure 2 and Figure 3 As shown, the two ends of the receiving structure 21 are respectively a fixed end and a movable end, the fixed end is fastened to the first side plate 22, and the side of the movable end away from the fixed end is connected to the traction assembly 23, and the traction assembly 23 is connected to the second side plate 22; the anti-drop mechanism 20 also includes a rebound structure 24, the first end of the rebound structure 24 is fastened to the first side plate 22, and the second end of the rebound structure 24 is connected to the movable end, so that when the rebound force of the rebound structure 24 is greater than the traction force of the traction assembly 23, the receiving structure 21 is pulled back from the working state to the storage state. In this way, the setting of the rebound structure 24 ensures that the receiving structure 21 can be restored to the storage state after completing the receiving operation of the electronic component 3 and after the electronic component 3 is taken away by the staff, thereby ensuring the reliability of the subsequent suction operation of the suction cup 11 of the suction assembly 10.

[0052] like Figure 4As shown, the traction assembly 23 includes a transmission rod 231, a traction rope 232 and a first driving part 233, wherein the transmission rod 231 is rotatably arranged on the second side plate 22, and the axial ends of the transmission rod 231 respectively pass through the two side surfaces of the second side plate 22; the first end of the traction rope 232 is connected to the movable end, and the second end of the traction rope 232 is wound on the transmission rod 231; the first driving part 233 is connected to the second side plate 22, and the first driving part 233 is drivingly connected to the transmission rod 231 through the first transmission mechanism 234. In this way, by setting the traction assembly 23 to include the transmission rod 231, the traction rope 232, the first driving part 233 and the first transmission mechanism 234, the pulling reliability of the receiving structure 21 and the compactness of the overall structure are ensured.

[0053] like Figure 4 As shown, the first transmission mechanism 234 includes a first gear structure 2341, a second gear structure 2342 and a transmission toothed belt 2343, wherein the first gear structure 2341 is sleeved on the driving shaft 2331 of the first driving part 233; the second gear structure 2342 is sleeved on the outer peripheral side of the transmission rod 231; and the transmission toothed belt 2343 is wound around the first gear structure 2341 and the second gear structure 2342, so that the first gear structure 2341 and the second gear structure 2342 rotate synchronously. In this way, by making the first transmission mechanism 234 include the first gear structure 2341, the second gear structure 2342 and the transmission toothed belt 2343, the reliability of power transmission can be ensured while also ensuring the compactness of the overall structure.

[0054] like Figure 3 As shown, there are two transmission rods 231, which are arranged in parallel in the lifting direction of the suction cup 11, and the two transmission rods 231 are connected by a transmission belt 25, and a traction rope 232 is wound around the axial ends of each transmission rod 231. In this way, the stability of pulling the receiving structure 21 is ensured, thereby ensuring that the receiving structure 21 can move quickly and smoothly.

[0055] like Figure 2 and Figure 3 As shown, a relief hole is provided on the support plate 12, a first end of the ventilation duct 13 is connected to the air source 26, a second end of the ventilation duct 13 passes through the relief hole and is connected to the suction cup 11, and the ventilation duct 13 is slidably arranged along the axial direction of the relief hole, so that the suction cup 11 can be raised and lowered. In this way, the lifting reliability of the suction cup 11 is ensured.

[0056] like Figure 2As shown, the suction assembly 10 also includes a connecting plate 14, a bracket structure 15 and a second driving part 16, wherein the connecting plate 14 is connected to the ventilation duct 13 located on the side of the support plate 12 away from the suction cup 11; the bracket structure 15 is arranged on the side surface of the support plate 12 away from the suction cup 11; the fixed part of the second driving part 16 is connected to the bracket structure 15, and the movable part of the second driving part 16 is connected to the connecting plate 14, so as to drive the suction cup 11 located at the end of the ventilation duct 13 to rise and fall through the connecting plate 14.

[0057] In some embodiments, the second driving part 16 is a cylinder, the fixed part is a cylinder body of the cylinder, and the movable part is a piston of the cylinder.

[0058] like Figure 2 As shown, the ventilation duct 13 includes a main air pipe 131, a first branch air pipe 132, a second branch air pipe 133 and a control module, wherein the main air pipe 131 is slidably arranged on the support plate 12, and the main air pipe 131 is connected to the connecting plate 14, and one end of the main air pipe 131 away from the connecting plate 14 is connected to the suction cup 11; the first end of the first branch air pipe 132 is connected to the main air pipe 131, and the second end of the first branch air pipe 132 is connected to the air source 26; the first end of the second branch air pipe 133 is connected to the main air pipe 131, and the second end of the second branch air pipe 133 is connected to the air source 26, so that the second branch air pipe 133 is connected to the first branch air pipe 133. The branch air pipes 132 are arranged in parallel; wherein, the main air pipe 131, the first branch air pipe 132 and the second branch air pipe 133 are respectively provided with a first air pressure sensor 1311, a second air pressure sensor 1321 and a third air pressure sensor 1331, and the first branch air pipe 132 and the second branch air pipe 133 are respectively provided with a first solenoid valve 1322 and a second solenoid valve 1332; the first air pressure sensor 1311, the second air pressure sensor 1321 and the third air pressure sensor 1331 are all connected to the control module, and the control module is at least controlled and connected with the first solenoid valve 1322, the second solenoid valve 1332 and the first drive unit 233.

[0059] In some embodiments of the present application, when the second air pressure sensor 1321 detects that the real-time air pressure value in the first branch air pipe 132 is lower than the preset air pressure value, the control module controls the second solenoid valve 1332 to open so that the second branch air pipe 133 is connected to the air source 26, and after the first preset time, the control module controls the first solenoid valve 1322 to close; when the first air pressure sensor 1311 detects that the real-time air pressure value in the main air pipe 131 is within the normal range, and the third air pressure sensor 1331 detects that the real-time air pressure value in the second branch air pipe 133 is within the normal range, the suction cup 11 continues to grab the electronic component 3. In this way, the setting of the first branch air pipe 132 and the second branch air pipe 133 can play the role of starting the second branch air pipe 133 to effectively adsorb the electronic component 3 when the real-time air pressure value in the first branch air pipe 132 does not meet the preset air pressure value.

[0060] Optionally, the first preset duration is 3s.

[0061] It should be noted that, under the premise that the first solenoid valve 1322 is in a closed state and the second solenoid valve 1332 is in an open state, when the real-time air pressure value in at least one of the main air pipe 131 and the second branch air pipe 133 is lower than the preset air pressure value, the control module controls the first drive unit 233 to start so that the receiving structure 21 switches to the working state, and after the second preset time, the control module controls the second solenoid valve 1332 to close; or, when the first air pressure sensor 1311 detects that the real-time air pressure value in the main air pipe 131 is lower than the preset air pressure value, the control module controls the first drive unit 233 to start so that the receiving structure 21 switches to the working state, and closes the first solenoid valve 1322 within the second preset time; or, when the first air pressure sensor 1311 detects that the real-time air pressure value in the main air pipe 131 is lower than the preset air pressure value, the control module controls the first drive unit 233 to start so that the receiving structure 21 switches to the working state, and closes the second solenoid valve 1332 within the second preset time. In this way, it is ensured that the receiving structure 21 can be activated in time when the air pressure in the ventilation duct 13 is abnormal, thereby ensuring the reliability of receiving the electronic component 3.

[0062] Optionally, the second preset time length is 10s.

[0063] like Figure 2 As shown, the first branch air pipe 132 and the second branch air pipe 133 are respectively provided with a first air pump 1323 and a second air pump 1333, the first solenoid valve 1322 is located between the first air pump 1323 and the air source 26, and the second solenoid valve 1332 is located between the second air pump 1333 and the air source 26. In this way, the arrangement of the first air pump 1323 and the second air pump 1333 plays a pumping role.

[0064] It should be noted that, in an embodiment of the present application not shown in the figure, the assembly device further includes an alarm module, the control module is connected to the alarm module, and when the control module controls the first driving part 233 to start, the alarm module is synchronously controlled to sound an alarm to remind the staff that the electronic component 3 has fallen. In this way, the setting of the alarm module plays an effective role in reminding the staff, ensuring that the subsequent staff can promptly remove the electronic component 3 on the receiving structure 21 after hearing the alarm.

[0065] It should be noted that, in an embodiment of the present application not shown in the figure, a tension sensor is provided on the rebound structure 24 to detect the tension applied to the rebound structure 24. When the transmission rod 231 reels the traction rope 232 to stretch the rebound structure 24, the tension signal obtained by the tension sensor is a normal signal. When the electronic component 3 falls on the receiving structure 21, the rebound structure 24 generates a tension toggle, and when the tension applied to the rebound structure 24 becomes smaller after exceeding the preset tension value, it indicates that the electronic component 3 dropped on the receiving structure 21 is taken away. After the third preset time, the control module controls the first driving part 233 to rotate in the opposite direction, so that the transmission rod 231 reverses and unwinds the receiving structure 21. At the same time, the rebound structure 24 pulls the receiving structure 21 back to the storage state. In this way, the convenience of switching the receiving structure 21 from the working state to the storage state is ensured.

[0066] Optionally, the third preset time length is 10s.

[0067] like Figure 3As shown, the anti-falling mechanism 20 includes a first side plate 22, a second side plate 22, and a receiving structure 21. One end of the receiving structure 21 is fixed to the first side plate 22, and the other end of the receiving structure 21 is connected to the second side plate 22 through a traction assembly 23. The traction assembly 23 can pull the receiving structure 21 so that there is an occlusion at the bottom between the first side plate 22 and the second side plate 22, so that the electronic component 3 can directly fall onto the receiving structure 21. The liftable suction cup 11 is arranged between the first side plate 22 and the second side plate 22. A second driving part 16 (lifting cylinder) is arranged on the top surface of the support plate 12. A connecting plate 14 is fixed on the suction pipe of the suction cup 11. The cylinder body of the lifting cylinder is fixed on the support plate 12 through a bracket structure 15. The piston rod of the lifting cylinder faces downward and is fixed to the connecting plate 14. When the piston rod of the lifting cylinder extends, the suction cup 11 is located below the first side plate 22 and the second side plate 22 to facilitate placing the electronic component 3 on the PCBA board. Before placing the electronic component 3, the piston rod of the lifting cylinder remains retracted, and the suction cup 11 is located above the receiving structure 21. The receiving structure 21 is in a lying C shape. The traction assembly 23 includes a traction rope 232, a transmission rod 231, a first driving part 233, a first gear structure 2341, a second gear structure 2342, and a transmission toothed belt 2343. One end of the traction rope 232 is fixedly connected to the end of the receiving structure 21 away from the first side plate 22, and the other end of the traction rope 232 is wound around the transmission rod 231. One end of the elastic return structure 24 is fixedly connected to the end of the receiving structure 21 away from the first side plate 22, and the other end of the elastic return structure 24 is fixed to the first side plate 22. The transmission rods 231 are two parallel rods arranged up and down on the second side plate 22. The two ends of the transmission rod 231 pass through the second side plate 22, and synchronous rotation between the two transmission rods 231 is achieved through a transmission belt 25. When the electronic component 3 does not need to be supported, the elastic return structure 24 pulls the receiving structure 21 so that the receiving structure 21 is received on one side of the first side plate 22. When the electronic component 3 needs to be supported, the traction rope 232 pulls the receiving structure 21 to open the receiving structure 21. The first driving part 233 is fixedly installed on the second side plate 22. The first gear structure 2341 is coaxially connected to the driving shaft 2331 of the first driving part 233. The second gear structure 2342 is coaxially connected to the transmission rod 231. The transmission toothed belt 2343 is sleeved on the first gear structure 2341 and the second gear structure 2342 at the same time. When the first air pressure sensor 1311 detects that the air pressure value of the main air pipe 131 drops below the preset air pressure value or the third air pressure sensor 1331 monitors that the air pressure value of the second branch air pipe 133 drops below the preset air pressure value, the first driving part 233 is started. The first driving part 233 drives the first gear structure 2341 to rotate, drives the second gear structure 2342 to rotate, drives the two transmission rods 231 to rotate, and thus quickly pulls the receiving structure 21 to open. The C-shaped receiving structure 21 can better protect the electronic component 3.

[0068] An alarm module is also provided inside the assembly device. When the first driving part 233 is started, the alarm module is started synchronously to issue an alarm, prompting the staff that the electronic component 3 has fallen. A tension sensor (not shown in the figure) is provided between the elastic structure 24 and the first side plate 22. The tension sensor is used to detect the tension received by the elastic structure 24. During the process that the transmission rod 231 winds up the traction rope 232 to stretch the elastic structure 24, the electrical signal sent by the tension sensor is a normal signal. When the electronic component 3 falls on the receiving structure 21, the traction rope 232 is a rigid rope body, so the elastic structure 24 will be subject to a tension fluctuation at this time. When the tension exceeds the set value and then becomes smaller, it indicates that the electronic component 3 has been taken away. After 3 s, the first driving part 233 reverses, the transmission rod 231 reverses to unwind the receiving structure 21, and the elastic structure 24 pulls the receiving structure 21 back to its position.

[0069] The principle of the above design is to achieve effective protection against the fall of the electronic component 3 through the rapid response of the mechanical structure. The implementation effect is that at the moment when the pneumatic component fails, the anti-falling mechanism 20 can be quickly started to avoid damage to the electronic component 3. At the same time, the alarm module notifies the operator in time to reduce production losses. The application scenario is also on the PCBA production line in the electronic manufacturing industry, especially when dealing with precision and fragile electronic components 3, which can significantly improve the safety and efficiency of the production line. The use process involves immediately starting the first driving part 233 when the air pressure detection sensor detects abnormal air pressure, and quickly deploying the receiving structure 21 through the transmission of the gear and the transmission belt 25 to form a temporary support platform to prevent the electronic component 3 from falling. At the same time, the alarm module is started to remind the operator to pay attention, and the tension sensor feeds back a signal to the control system after the electronic component 3 is safely transferred, prompting the first driving part 233 to reverse and retract the receiving structure 21 to prepare for the next protection action.

[0070] Such as Figure 2As shown, the suction component 10 includes a support plate 12, a suction cup 11, a main air pipe 131, a first branch air pipe 132, and a second branch air pipe 133. The support plate 12 is movably arranged in the operation space 31 of the assembly rack 30 through a three-axis module 50. The suction cup 11 is located below the support plate 12. The main air pipe 131 connected to the suction cup 11 passes through the avoidance through hole on the support plate 12. The straw part of the suction cup 11 is connected and communicated with the main air pipe 131. The main air pipe 131 is simultaneously connected and communicated with the first branch air pipe 132 and the second branch air pipe 133. The first branch air pipe 132 is connected to the air source 26 through a first air pump 1323. The second branch air pipe 133 is connected to the air source 26 through a second air pump 1333. A first electromagnetic valve 1322 is arranged on the pipeline between the first air pump 1323 and the air source 26. A second electromagnetic valve 1332 is arranged on the pipeline between the second air pump 1333 and the air source 26. A first air pressure sensor 1311 is arranged on the main air pipe 131. A second air pressure sensor 1321 is arranged on the first branch air pipe 132. A third air pressure sensor 1331 is arranged on the second branch air pipe 133. When the second air pressure sensor 1321 detects that the air pressure value in the first branch air pipe 132 drops below the preset air pressure value, the second electromagnetic valve 1332 is opened, the second branch air pipe 133 is communicated with the air source 26, the second air pump 1333 is started, and the channel of the second branch air pipe 133 starts to work. After 3 s, the first electromagnetic valve 1322 is closed and the first air pump 1323 is closed, so that the second branch air pipe 133 replaces the first branch air pipe 132 to maintain normal operation. If at this time the first air pressure sensor 1311 detects that the air pressure value in the main air pipe 131 is normal and the third air pressure sensor 1331 detects that the air pressure value in the second branch air pipe 133 is normal, the electronic component 3 is continuously grasped. If at this time the first air pressure sensor 1311 detects that the air pressure value in the main air pipe 131 drops below the preset air pressure value or the third air pressure sensor 1331 detects that the air pressure value in the second branch air pipe 133 drops below the preset air pressure value, the anti-drop mechanism 20 takes effect, and the second air pump 1333 and the second electromagnetic valve 1332 are closed after 10 s. When the first air pressure sensor 1311 directly detects that the air pressure value of the main air pipe 131 drops below the preset air pressure value, the anti-drop mechanism 20 takes effect, and the first air pump 1323 and the first electromagnetic valve 1322 are closed after 10 s / the second air pump 1333 and the second electromagnetic valve 1332 are closed after 10 s (whichever is running is closed).

[0071] The principle of the above design is to achieve automatic switching in case of pneumatic component failures and the activation of the anti-drop mechanism 20 through the cooperation of a dual-air circuit system and a pneumatic pressure detection sensor, ensuring the safety of the electronic component 3 during the assembly process. The implementation effect is manifested as improved equipment stability and the assembly success rate of the electronic component 3, reduced production downtime and component losses caused by pneumatic component failures, and it is applicable to the electronics manufacturing industry, especially on PCBA production lines with a high degree of automation, for ensuring the assembly quality and production continuity of the electronic component 3. The usage process involves checking whether the pneumatic system is normal before starting the assembly. Once abnormal air pressure is detected, the system automatically switches to the standby air circuit and activates the anti-drop mechanism 20 to ensure that the electronic component 3 does not fall due to the loss of suction.

[0072] As Figure 1 shown, the assembly device further includes an assembly rack 30. The assembly rack 30 has an operation space 31. The substrate 1 to be assembled and the carrier box 2 are both located in the operation space 31, and the suction assembly 10 is movably arranged in the operation space 31; or, a camera 40 is provided on at least one side wall surface of the operation space 31. In this way, the setting of the assembly rack 30 plays a role in protecting the suction assembly 10 and the anti-drop mechanism 20; in addition, the setting of the camera 40 plays a role in observing the position of the electronic component 3 in all directions without dead angles.

[0073] Furthermore, as Figure 1As shown in the figure, the assembly rack 30 is in the shape of a "mouth". A positioning component 60 for the substrate 1 (PCBA board) to be assembled is provided on the bottom plate of the assembly rack 30. The positioning component 60 includes a positioning post 61 and a positioning elastic piece 62. The positioning post 61 is fixed on the bottom plate of the assembly rack 30. The positioning elastic piece 62 is in a Z shape. The top end of the positioning elastic piece 62 is fixed to the positioning post 61, and the bottom end of the positioning elastic piece 62 abuts against the PCBA board, fixing the PCBA board on the bottom plate of the assembly rack 30. A carrier box 2 for accommodating the electronic components 3 is also provided on the bottom plate of the assembly rack 30. A plurality of partition plates 201 are arranged at equal intervals along the length direction inside the carrier box 2 to form a placement channel. The electronic components 3 are arranged in an array along the length direction of the placement channel for easy picking. Camera 40s are provided on the cavity wall surfaces of the operation space 31 of the assembly rack 30. The positions of the electronic components 3 are photographed by the camera 40s at multiple angles, and the control module controls the suction cup 11 of the suction component 10 to move to a suitable position. The principle of this design is to ensure the precise alignment of the PCBA board and the electronic components 3 during the assembly process by combining physical positioning and visual positioning. The implementation effect is to improve the assembly accuracy and speed, reduce manual intervention, and enhance the automation level. The application scenario is mainly in the electronic manufacturing industry, especially in the PCBA (Printed Circuit Board Assembly) production line for high-density and high-precision circuit board assembly. The use process involves placing the PCBA board on the positioning component 60, capturing the information of the electronic components 3 through the camera 40, and the control module adjusting the position of the suction cup 11 accordingly to achieve precise suction and placement.

[0074] The anti-drop mechanism 20 provided in this application significantly improves the safety and reliability of the PCBA board assembly process. By real-time monitoring of the pressure change in the ventilation pipe 13, it can be immediately activated before the pneumatic components fail, effectively preventing the electronic components 3 from falling due to the loss of suction, avoiding the damage of the electronic components 3 and production interruption. In addition, the combination of the elastic return structure 24 (elastic cord) and the tension sensor can not only respond quickly but also accurately determine whether the electronic components 3 have been safely transferred, ensuring the efficient reset of the anti-drop mechanism 20, reducing unnecessary waiting time, and improving production efficiency. The overall design of the assembly device in this application is compact and easy to integrate into the existing PCBA assembly production line, reducing the maintenance cost and enhancing the market competitiveness of the equipment.

[0075] The above has introduced in detail an assembly device for a circuit board provided in this application. Specific examples are used in this article to elaborate on the principle and implementation manner of this application. The description of the above embodiments is only used to help understand the method and its core idea of this application. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of this application, several improvements and modifications can be made to this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. An assembly device for a circuit board, characterized in that, include: A suction assembly (10), the suction assembly (10) comprising a suction cup (11), at least the suction cup (11) being movably arranged between a substrate to be assembled (1) and a carrier box (2) for placing an electronic component (3), so as to suck the electronic component (3) through the suction cup (11) and place it at a preset position of the substrate to be assembled (1); An anti-drop mechanism (20) is connected to the suction assembly (10), and the anti-drop mechanism (20) has a receiving structure (21), the receiving structure (21) is adjustable in state, the receiving structure (21) has a working state of opening to the bottom area of ​​the suction cup (11) to receive the electronic component (3) that falls off the suction cup (11), and the receiving structure (21) has a storage state of exiting the bottom area of ​​the suction cup (11).

2. The assembly device according to claim 1, characterized in that, The anti-drop mechanism (20) is detachably connected to the suction assembly (10).

3. The assembly device according to claim 1, characterized in that, The receiving structure (21) is expanded in a horizontal direction, and the receiving structure (21) is retracted in a horizontal direction.

4. The assembly device according to claim 1, characterized in that, When the receiving structure (21) is in the working state, the projection of the receiving structure (21) in the moving direction thereof is in a horizontal C-shape.

5. The assembly device according to claim 1, characterized in that, The suction assembly (10) comprises: A support plate (12), wherein the suction cup (11) is movably connected to the support plate (12) via a ventilation pipe (13); The anti-drop mechanism (20) comprises: Two side plates (22), the two side plates (22) being respectively located on two radial sides of the suction cup (11), and the two side plates (22) being connected to the support plate (12); The two ends of the receiving structure (21) are respectively connected to the two side plates (22), and at least one end of the receiving structure (21) is connected to the corresponding side plate (22) via a traction assembly (23), so that the receiving structure (21) is pulled by the traction assembly (23) and opened from the storage state to the working state.

6. The assembly device according to claim 5, characterized in that, The two ends of the receiving structure (21) are respectively a fixed end and a movable end, the fixed end is fastened to the first side plate (22), the side of the movable end facing away from the fixed end is connected to the traction component (23), and the traction component (23) is connected to the second side plate (22); The anti-drop mechanism (20) further comprises: A rebound structure (24), wherein a first end of the rebound structure (24) is fastened to the first side plate (22), and a second end of the rebound structure (24) is connected to the movable end, so that when the rebound force of the rebound structure (24) is greater than the traction force of the traction assembly (23), the receiving structure (21) is pulled back from the working state to the storage state.

7. The assembly device according to claim 6, characterized in that, The traction assembly (23) comprises: a transmission rod (231), the transmission rod (231) being rotatably disposed on the second side plate (22), and the axial ends of the transmission rod (231) respectively passing through two side surfaces of the second side plate (22); A traction rope (232), wherein a first end of the traction rope (232) is connected to the movable end, and a second end of the traction rope (232) is wound around the transmission rod (231); A first driving part (233), the first driving part (233) is connected to the second side plate (22), and the first driving part (233) is drivingly connected to the transmission rod (231) via a first transmission mechanism (234).

8. The assembly device according to claim 7, characterized in that, The first transmission mechanism (234) comprises: a first gear structure (2341), wherein the first gear structure (2341) is sleeved on a driving shaft (2331) of the first driving part (233); a second gear structure (2342), the second gear structure (2342) being sleeved on the outer peripheral side of the transmission rod (231); A transmission toothed belt (2343), wherein the transmission toothed belt (2343) is wound around the first gear structure (2341) and the second gear structure (2342), so that the first gear structure (2341) and the second gear structure (2342) rotate synchronously.

9. The assembly device according to claim 7, characterized in that, There are two transmission rods (231), the two transmission rods (231) are arranged in parallel in the lifting direction of the suction cup (11), the two transmission rods (231) are connected to each other by a transmission belt (25), and the traction rope (232) is wound around both axial ends of each transmission rod (231).

10. The assembly device according to claim 7, characterized in that, The support plate (12) is provided with an escape hole, a first end of the ventilation duct (13) is in communication with an air source (26), a second end of the ventilation duct (13) passes through the escape hole and is connected to the suction cup (11), and the ventilation duct (13) is slidably arranged along the axial direction of the escape hole so that the suction cup (11) can be raised and lowered.

11. The assembly device according to claim 10, characterized in that, The suction assembly (10) further comprises: A connecting plate (14), the connecting plate (14) being connected to the ventilation duct (13) located on a side of the supporting plate (12) facing away from the suction cup (11); A support structure (15), the support structure (15) being arranged on a surface of a side of the support plate (12) facing away from the suction cup (11); A second driving part (16), wherein a fixed part of the second driving part (16) is connected to the support structure (15), and a movable part of the second driving part (16) is connected to the connecting plate (14), so as to drive the suction cup (11) located at the end of the ventilation duct (13) to rise and fall through the connecting plate (14).

12. The assembling device according to claim 11, wherein, The ventilation duct (13) comprises: A main air pipe (131), the main air pipe (131) being slidably disposed on the support plate (12), the main air pipe (131) being connected to the connection plate (14), and one end of the main air pipe (131) facing away from the connection plate (14) being connected to the suction cup (11); a first branch air pipe (132), wherein a first end of the first branch air pipe (132) is in communication with the main air pipe (131), and a second end of the first branch air pipe (132) is in communication with an air source (26); The second branch air pipe (133), the first end of the second branch air pipe (133) is communicated with the main air pipe (131), and the second end of the second branch air pipe (133) is communicated with the air source (26), so that the second branch air pipe (133) is arranged in parallel with the first branch air pipe (132); Wherein, a first air pressure sensor (1311), a second air pressure sensor (1321), and a third air pressure sensor (1331) are respectively arranged on the main air pipe (131), the first branch air pipe (132), and the second branch air pipe (133), and a first electromagnetic valve (1322) and a second electromagnetic valve (1332) are respectively arranged on the first branch air pipe (132) and the second branch air pipe (133); A control module, the first air pressure sensor (1311), the second air pressure sensor (1321), and the third air pressure sensor (1331) are all connected to the control module, and the control module is at least connected to the first electromagnetic valve (1322), the second electromagnetic valve (1332), and the first driving part (233) for control.

13. The assembling device according to claim 12, wherein, When the second air pressure sensor (1321) detects that the real-time air pressure value in the first branch air pipe (132) is lower than the preset air pressure value, the control module controls the second electromagnetic valve (1332) to open, so that the second branch air pipe (133) is communicated with the air source (26), and after a first preset time period, the control module controls the first electromagnetic valve (1322) to close; When the first air pressure sensor (1311) detects that the real-time air pressure value in the main air pipe (131) is within the normal range, and the third air pressure sensor (1331) detects that the real-time air pressure value in the second branch air pipe (133) is within the normal range, the suction cup (11) continues to grasp the electronic component (3).

14. The assembling device according to claim 13, wherein, On the premise that the first electromagnetic valve (1322) is in the closed state and the second electromagnetic valve (1332) is in the open state, when the real-time air pressure value in at least one of the main air pipe (131) and the second branch air pipe (133) is lower than the preset air pressure value, the control module controls the first driving part (233) to start so that the receiving structure (21) switches to the working state, and after a second preset time period, the control module controls the second electromagnetic valve (1332) to close; or, When the first air pressure sensor (1311) detects that the real-time air pressure value in the main air pipe (131) is lower than the preset air pressure value, the control module controls the first driving part (233) to start so that the receiving structure (21) switches to the working state, and closes the first electromagnetic valve (1322) after a second preset time period; or, When the real-time air pressure value in the main air pipe (131) detected by the first air pressure sensor (1311) is lower than the preset air pressure value, the control module controls the first driving part (233) to start so that the receiving structure (21) switches to the working state, and closes the second solenoid valve (1332) after a second preset time period.

15. The assembling device according to claim 12, wherein, A first air pump (1323) and a second air pump (1333) are respectively arranged on the first branch air pipe (132) and the second branch air pipe (133). The first solenoid valve (1322) is located between the first air pump (1323) and the air source (26), and the second solenoid valve (1332) is located between the second air pump (1333) and the air source (26).

16. The assembling device according to claim 12, wherein, The assembling device further includes: An alarm module, the control module is connected to the alarm module for control. When the control module controls the first driving part (233) to start, it synchronously controls the alarm module to give an alarm to prompt the staff that an electronic component (3) has fallen.

17. The assembling device according to claim 12, wherein, A tension sensor is arranged on the elastic return structure (24) to detect the tension received by the elastic return structure (24). When the transmission rod (231) winds up the traction rope (232) to stretch the elastic return structure (24), the tension signal obtained by the tension sensor is a normal signal; After the electronic component (3) falls on the receiving structure (21), the elastic return structure (24) generates a pulling force and toggles. When the pulling force received by the elastic return structure (24) exceeds the preset pulling force value and then becomes smaller, it indicates that the electronic component (3) that has fallen on the receiving structure (21) has been taken away. The control module controls the first driving part (233) to rotate in the reverse direction after a third preset time period, so that the transmission rod (231) rotates in the reverse direction and unwinds the receiving structure (21). At the same time, the elastic return structure (24) pulls the receiving structure (21) back to the storage state.

18. The assembling device according to any one of claims 1 to 17, wherein, The assembling device further includes: An assembling frame (30), the assembling frame (30) has an operating space (31), the substrate to be assembled (1) and the carrier box (2) are both located in the operating space (31), and the suction component (10) is movably arranged in the operating space (31); or, A camera (40) is arranged on at least one side wall surface of the operating space (31).

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