Smt paster pneumatic jig mechanism

Abstract

The utility model relates to a kind of SMT patch pneumatic jig mechanism, including pneumatic jig assembly and patch clamp, multiple clamping units are equipped on the patch clamp, the clamping unit is for clamping PCB loaded on the patch clamp, the pneumatic jig assembly includes jig base and multiple drive assemblies, the patch clamp is detachably located on the jig base, the drive assembly can drive the clamping unit switches between clamping state and loosening state. The utility model has the beneficial effects that it is convenient to load PCB and ensure the stability of PCB clamping, and production efficiency can be improved.

Description

Technical Field

[0001] This utility model relates to the field of SMT (Surface Mount Technology) technology, specifically to an SMT pneumatic fixture mechanism. Background Technology

[0002] In the field of electronics manufacturing, surface mount technology (SMT) is a widely used circuit board assembly process that enables electronic components to be quickly and accurately mounted onto printed circuit boards (PCBs), achieving efficient production of electronic products.

[0003] In the SMT (Surface Mount Technology) placement process, placement fixtures are needed to hold the PCB in place to ensure the accuracy and stability of the placement operation. Traditional SMT placement fixtures typically use clips to hold the PCB in place. Specifically, a placement fixture requires 8 to 10 individual clips. When loading the PCB, the operator needs to open these clips one by one, place the PCB on the fixture, and then close the clips one by one to complete the PCB fixation.

[0004] This traditional clip-on clamping method is extremely cumbersome to operate. Operators need to spend a lot of time and energy to open and close the clips, resulting in low PCB loading efficiency and seriously affecting the progress of the entire SMT assembly production. Moreover, manual operation may result in forgetting to close the clips due to fatigue, which will cause the PCB to be not firmly fixed on the fixture, and may move or shake during the assembly process, increasing the product defect rate. Utility Model Content

[0005] The purpose of this utility model is to provide an SMT pneumatic fixture mechanism that facilitates PCB loading, ensures PCB clamping stability, and improves production efficiency.

[0006] An SMT pneumatic fixture mechanism includes a pneumatic fixture assembly and a placement clamp. The placement clamp is provided with multiple clamping units, which are used to clamp a PCB mounted on the placement clamp. The pneumatic fixture assembly includes a fixture base and multiple drive components. The placement clamp is detachably mounted on the fixture base. The drive components can drive the clamping units to switch between a clamping state and a releasing state.

[0007] In the above solution, the surface mount fixture is placed on the fixture base. At this time, the clamping unit is in the clamping state. The drive component drives the clamping unit to move, causing the clamping unit to switch to the loosening state. This makes it easier to load the PCB onto the surface mount fixture. After the PCB is placed, the drive component runs again, causing the clamping unit to switch back to the clamping state, thus firmly clamping the PCB. Then the surface mount fixture with the PCB can be removed for subsequent processes. The drive component of the pneumatic fixture assembly can simultaneously control multiple clamping units to switch between the clamping and loosening states, greatly reducing the PCB loading time and thus improving production efficiency.

[0008] Furthermore, the driving assembly includes a driving element, a connecting block, and a push rod. The connecting block is connected to the output end of the driving element, and the push rod is connected to the connecting block. The push rod is used to drive the clamping unit to open so that the PCB can be placed.

[0009] In the above scheme, the push rod and the connecting block can be separate or integrated. The connecting block is convenient to connect to the output end of the driving component. The output end of the driving component can drive the connecting block to move back and forth, thereby driving the push rod in the vertical direction to move back and forth to drive the clamping unit to open. After the clamping unit opens, the PCB is placed and the clamping unit clamps the PCB.

[0010] Furthermore, the patch fixture is provided with multiple mounting slots, the clamping unit is mounted on the mounting slots, the mounting slots are provided with elongated oval holes, and the push rod is movably inserted through the elongated oval holes.

[0011] In the above scheme, the mounting slot is provided on the patch fixture for mounting the clamping unit. This design allows the clamping unit to be accurately positioned on the patch fixture, ensuring the accuracy and consistency of the position of each clamping unit. The elongated hole provides a precise movement path for the push rod, enabling the push rod to move back and forth stably along the elongated hole to drive the clamping unit to switch between the clamping and releasing states, thereby improving the stability and reliability of the entire mechanism.

[0012] Furthermore, the clamping unit includes a buckle, an elastic element, and a cover plate. At least two of the elastic elements have one end connected to the buckle and the other end connected to the inner sidewall of the mounting groove. The cover plate covers the buckle and the elastic element and locks onto the mounting groove. The buckle has a connecting hole for the push rod to pass through.

[0013] In the above scheme, the elastic element connects the buckle and the inner wall of the mounting slot. Under normal conditions, the elastic force of the elastic element keeps the buckle in the clamped position, providing a stable clamping force for the PCB. This method of utilizing elastic force can ensure that the PCB can still be reliably clamped under different working environments, such as slight vibration or external interference, reducing the risk of PCB displacement during the placement process and improving the accuracy and quality of placement. The cover plate can enhance the structural strength of the entire clamping unit, making the buckle and elastic element more stable during operation and less prone to deformation or displacement. The buckle is driven to move by a push rod passing through the connection hole on the buckle. This connection method is simple and direct, allowing the drive component to easily control the clamping and releasing states of the clamping unit.

[0014] Furthermore, the side of the buckle that movably abuts against the PCB has a toothed structure.

[0015] In the above solution, compared with a smooth surface, the friction between the toothed structure and the PCB is greatly increased. During the placement process, even if the fixture is subjected to slight vibration or external interference, the increased friction can ensure that the PCB will not easily shift or shake, thereby ensuring the accuracy and stability of the placement and effectively reducing the placement defect rate.

[0016] Furthermore, the fixture base includes a base plate and side plates surrounding the base plate. The base plate is provided with multiple sets of mounting holes, and the drive component is connected to the mounting holes via fasteners.

[0017] In the above solution, the base plate of the fixture base is used to place the patch fixture. The base plate is supported by the side plates around it, so that the drive component can be installed below the base plate. This achieves a reasonable layout of the drive component and the patch fixture. Fasteners are passed through the mounting holes and locked onto the drive component, so that the drive component is stably connected to the base plate of the fixture base. The structure is simple and easy to assemble and disassemble.

[0018] Furthermore, the mounting hole is oblong.

[0019] In the above solution, the elongated oval mounting hole provides greater adjustment space for the drive component compared to the traditional circular mounting hole. In actual production, due to manufacturing tolerances, assembly errors, or variations in different production requirements, the optimal installation position of the drive component may have slight deviations. The elongated oval mounting hole allows the drive component to move and adjust within a certain range. Operators can flexibly install the drive component to the most suitable position according to specific circumstances, ensuring its fit with other components and improving the installation accuracy and reliability of the entire pneumatic fixture assembly. Furthermore, the pneumatic fixture assembly also includes a pressure plate and a connecting plate. The connecting plate is mounted on the fixture base, and the pressure plate is rotatably connected to the connecting plate. The pressure plate is used to flatten the PCB.

[0020] In the above solution, the pressure plate can evenly distribute the pressure on the PCB surface, avoiding excessive or insufficient local pressure. After the PCB is placed on the mounting fixture, the pressure plate is pressed on the PCB to press it into place and prevent the PCB from lifting. Then the clips clamp the PCB. At this time, the PCB is in a flat and stable state, and the clips can clamp the PCB more effectively.

[0021] Furthermore, the fixture base is provided with several limiting blocks, and at least four L-shaped limiting blocks are provided at the four corners of the patch fixture.

[0022] In the above solution, when the patch fixture is placed on the jig base, its four corners can accurately align with the L-shaped limiting blocks, thereby quickly and accurately determining the position of the patch fixture on the jig base. When installing or replacing the patch fixture, the operator does not need to perform complex adjustments and positioning operations. They only need to align the four corners of the fixture with the L-shaped limiting blocks to quickly complete the installation. The special shape of the L-shaped limiting blocks can limit the patch fixture in two mutually perpendicular directions, ensuring the positional stability of the patch fixture on the jig base.

[0023] Furthermore, it also includes a control valve, which is mounted on the fixture base. The air inlet of the control valve is connected to an air source, and the air outlet of the control valve is connected to multiple drive components through an air path.

[0024] In the above scheme, the control valve, as the connection hub between the air source and multiple driving components, can uniformly distribute the gas provided by the air source to each driving component. The control valve can accurately control the air intake and exhaust of each driving component according to the preset program or the operator's instructions, thereby realizing the orderly operation of the driving components. This helps to improve the working efficiency of the entire pneumatic fixture assembly, thereby improving the efficiency of PCB loading.

[0025] This utility model discloses an SMT (Surface Mount Technology) pneumatic fixture mechanism, which facilitates PCB loading, ensures PCB clamping stability, and improves production efficiency. The placement fixture is placed on the fixture base, with the clamping unit in a clamped state. The drive assembly moves the clamping unit to switch to an open state, making it easier to load the PCB onto the fixture. After the PCB is placed, the drive assembly operates again to switch the clamping unit back to a clamped state, firmly holding the PCB. The fixture with the PCB can then be removed for subsequent processes. The drive assembly of the pneumatic fixture can simultaneously control multiple clamping units to switch between clamping and open states, greatly reducing PCB loading time and thus improving production efficiency. Attached Figure Description

[0026] Figure 1 This is a perspective view of an SMT (Surface Mount Technology) pneumatic fixture mechanism according to one embodiment.

[0027] Figure 2 This is a plan view of an SMT (Surface Mount Technology) pneumatic fixture mechanism according to one embodiment.

[0028] Figure 3 This is a planar schematic diagram of a driving component according to one embodiment.

[0029] Figure 4 This is a schematic diagram of a patch fixture according to one embodiment.

[0030] Figure 5 This is a schematic diagram of a clamping unit structure according to one embodiment.

[0031] Figure 6 This is a schematic diagram of the fixture base structure according to one embodiment.

[0032] Figure 7 This is a schematic diagram of the connection structure of the pressure plate and the connecting plate in one embodiment.

[0033] Reference numerals in the attached diagrams are as follows: 1. Pneumatic fixture assembly; 11. Fixture base; 111. Base plate; 113. Mounting hole; 112. Side plate; 12. Drive assembly; 121. Drive component; 122. Connecting block; 123. Push rod; 13. Pressure plate; 14. Connecting plate; 15. Hinge; 2. Patch fixture; 21. Mounting slot; 211. Oblong hole; 3. Clamping unit; 31. Buckle; 311. Toothed structure; 32. Elastic component; 4. Limiting block; 5. Control valve; 6. PCB. Detailed Implementation

[0034] The following will describe in further detail a pneumatic fixture mechanism for SMT patching according to the present invention, with reference to specific embodiments and accompanying drawings.

[0035] like Figure 1 and Figure 2As shown in a preferred embodiment, the SMT placement pneumatic fixture mechanism of this utility model includes a pneumatic fixture assembly 1 and a placement clamp 2. The placement clamp 2 is provided with a plurality of clamping units 3, which are used to clamp the PCB 6 mounted on the placement clamp 2. The pneumatic fixture assembly 1 includes a fixture base 11 and a plurality of drive components 12. The placement clamp 2 is detachably disposed on the fixture base 11. The drive components 12 can drive the clamping units 3 to switch between a clamping state and a releasing state. Place the surface mount fixture 2 on the fixture base 11. At this time, the clamping unit is in the clamping state. The drive assembly 12 drives the clamping unit 3 to move, causing the clamping unit to switch to the loose state. This makes it easier to load the PCB6 onto the surface mount fixture 2. After the PCB6 is placed, the drive assembly 12 runs again, causing the clamping unit 3 to switch back to the clamping state, thus firmly clamping the PCB6. Then the surface mount fixture 2 with the PCB6 can be removed for subsequent processes. The drive assembly 12 of the pneumatic fixture assembly 1 can simultaneously control multiple clamping units 3 to switch between the clamping and loosening states, which greatly reduces the loading time of the PCB6 and thus improves production efficiency.

[0036] like Figure 2 and Figure 3 As shown, in some embodiments, the driving assembly 12 includes a driving element 121, a connecting block 122, and a push rod 123. The connecting block 122 is connected to the output end of the driving element 121, and the push rod 123 is connected to the connecting block 122. The push rod 123 is used to drive the clamping unit 3 to open so that the PCB6 can be placed. The push rod 123 and the connecting block 122 can be separate or integrated. The connecting block 122 is convenient to connect to the output end of the driving element 121. The output end of the driving element 121 can drive the connecting block 122 to move back and forth, thereby driving the vertical push rod 123 to move back and forth to drive the clamping unit 3 to open. After the clamping unit 3 opens and the PCB6 is placed, the clamping unit clamps the PCB6.

[0037] like Figure 4 and Figure 5 As shown, in some embodiments, the patch fixture 2 is provided with multiple mounting slots 21, and the clamping unit 3 is mounted on the mounting slot 21. The mounting slot 21 is provided with an elongated oval hole 211, through which the push rod 123 movably passes. The mounting slot 21 on the patch fixture 2 is used to mount the clamping unit 3. This design allows the clamping unit 3 to be accurately positioned on the patch fixture 2, ensuring the accuracy and consistency of the position of each clamping unit 3. The elongated oval hole 211 provides a precise moving path for the push rod 123, enabling the push rod 123 to move back and forth stably along the elongated oval hole 211 to drive the clamping unit 3 to switch between the clamping state and the loosening state, thereby improving the stability and reliability of the entire mechanism.

[0038] like Figure 5As shown, in some embodiments, the clamping unit 3 includes a buckle 31, an elastic element 32 and a cover plate. At least two elastic elements 32 have one end connected to the buckle 31 and the other end connected to the inner sidewall of the mounting groove 21. The cover plate covers the buckle 31 and the elastic element 32 and is locked onto the mounting groove 21. The buckle 31 is provided with a connection hole for the push rod 123 to pass through. The elastic element 32 connects the buckle 31 and the inner wall of the mounting groove 21. Under normal conditions, the elastic force of the elastic element 32 keeps the buckle 31 in the clamped position, providing a stable clamping force for the PCB6. This method of using elastic force can ensure that the PCB6 can still be reliably clamped under different working environments, such as slight vibration or external interference, reducing the risk of displacement of the PCB6 during the placement process and improving the accuracy and quality of the placement. The cover plate can enhance the structural strength of the entire clamping unit 3, making the buckle 31 and the elastic element 32 more stable during operation and less prone to deformation or displacement. The buckle 31 is driven to move by the push rod 123 passing through the connecting hole on the buckle 31. This connection method is simple and direct, allowing the drive assembly 12 to easily control the clamping and releasing state of the clamping unit 3.

[0039] In this embodiment, the drive member 121 drives the push rod 123 to extend before placing the surface mount fixture 2 on the fixture base 11. The push rod 123 passes through the elongated hole 211 and then through the connecting hole on the buckle 31. Afterward, the drive member 121 drives the push rod 123 to retract into the fixture base 11. Under the action of the external force applied by the push rod 123, the buckle 31 moves against the elastic force of the elastic member 32, thereby switching the clamping unit 3 from the clamping state to the loosening state, placing the PCB 6 onto the surface mount fixture 2, and then pushing... When rod 123 moves in the opposite direction, elastic element 32 recovers its deformation under its own elastic force, driving buckle 31 back to its initial position, so that clamping unit 3 returns to the clamping state, thus firmly clamping PCB6, easily realizing the clamping and disassembly of PCB6, reducing the difficulty of operation, and thus improving work efficiency. The cover plate is placed on buckle 31 and elastic element 32 and locked on mounting groove 21, which plays a role in protecting buckle 31 and elastic element 32, and also ensures the stability of the entire clamping unit 3 structure.

[0040] like Figure 5 As shown, in some embodiments, the side of the clip 31 that movably abuts against the PCB6 is provided with a toothed structure 311. Compared to a smooth surface, the friction between the toothed structure 311 and the PCB6 is greatly increased. During the placement process, even if the fixture is subjected to slight vibration or external interference, the increased friction can ensure that the PCB6 will not easily shift or wobble, thereby ensuring the accuracy and stability of the placement and effectively reducing the placement defect rate.

[0041] like Figure 6As shown, in some embodiments, the jig base 11 includes a base plate 111 and side plates 112 surrounding the base plate 111. The base plate 111 has multiple sets of mounting holes 113, and the drive component 121 is connected to the mounting holes 113 by fasteners. The base plate 111 of the jig base 11 is used to place the patch fixture 2. The base plate 111 is supported by the side plates 112, so that the drive component 12 can be installed below the base plate 111, realizing a reasonable layout of the drive component 12 and the patch fixture 2. Fasteners are passed through the mounting holes 113 and locked to the drive component 121, so that the drive component 121 is stably connected to the base plate 111 of the jig base 11. The structure is simple and easy to assemble and disassemble.

[0042] like Figure 6 As shown, in some embodiments, the mounting hole 113 is oblong. Compared to a traditional circular mounting hole 113, the oblong mounting hole 113 provides greater adjustment space when installing the drive component 121. In actual production, due to manufacturing tolerances, assembly errors, or variations in production requirements, the optimal installation position of the drive component 121 may have slight deviations. The oblong mounting hole 113 allows the drive component 121 to move and adjust within a certain range. Operators can flexibly install the drive component 121 to the most suitable position according to specific circumstances, ensuring its fitting accuracy with other components and improving the installation accuracy and reliability of the entire pneumatic fixture assembly 1. like Figure 2 and Figure 7 As shown, in some embodiments, the pneumatic fixture assembly 1 further includes a pressure plate 13 and a connecting plate 14. The connecting plate 14 is mounted on the fixture base 11, and the pressure plate 13 is rotatably connected to the connecting plate 14. The pressure plate 13 is used to flatten the PCB6. Here, the pressure plate 13 and the connecting plate 14 are rotatably connected by a hinge 15. The pressure plate 13 can evenly distribute the pressure on the surface of the PCB6, avoiding excessive or insufficient local pressure. After the PCB6 is placed on the mounting fixture 2, the pressure plate 13 is pressed onto the PCB6 to press the PCB6 into place and prevent the PCB6 from lifting. Then, the buckle 31 clamps the PCB6. At this time, the PCB6 is in a flat and stable state, and the buckle 31 can clamp the PCB6 more effectively.

[0043] like Figure 6As shown, in some embodiments, the fixture base 11 is provided with a plurality of limiting blocks 4, and at least four L-shaped limiting blocks 4 are provided at the four corners of the patch clamp 2. When the patch clamp 2 is placed on the fixture base 11, its four corners can accurately fit with the L-shaped limiting blocks 4, thereby quickly and accurately determining the position of the patch clamp 2 on the fixture base 11. When installing or replacing the patch clamp 2, the operator does not need to perform complex adjustment and positioning operations, but only needs to align the four corners of the clamp with the L-shaped limiting blocks 4 to quickly complete the installation. The special shape of the L-shaped limiting blocks 4 can limit the patch clamp 2 in two mutually perpendicular directions, ensuring the positional stability of the patch clamp 2 on the fixture base 11.

[0044] like Figure 6 As shown, in some embodiments, a control valve 5 is also included. The control valve 5 is mounted on the fixture base 11. The air inlet of the control valve 5 is connected to an air source, and the air outlet of the control valve 5 is connected to multiple drive components 121 through an air path. As a connection hub between the air source and the multiple drive components 121, the control valve 5 can uniformly distribute the gas provided by the air source to each drive component 121. The control valve 5 can accurately control the air intake and exhaust of each drive component 121 according to a preset program or operator instructions, thereby realizing the orderly operation of the drive components 121. This helps to improve the working efficiency of the entire pneumatic fixture assembly 1, thereby improving the efficiency of loading the PCB 6.

[0045] This utility model discloses the working principle and process of an SMT pneumatic fixture mechanism. The placement fixture 2 is placed on the fixture base 11, at which point the clamping unit is in a clamped state. The drive member 121 drives the push rod 123 to extend and then place the placement fixture 2 on the fixture base 11. Afterwards, the drive member 121 drives the push rod 123 to retract into the fixture base 11. Under the action of the external force applied by the push rod 123, the latch 31 moves against the elastic force of the elastic member 32, thereby switching the clamping unit 3 from the clamped state to the released state, placing the PCB6 on the placement fixture 2. Then, the push rod 123 moves in the opposite direction, and the elastic member 32 recovers its deformation under its own elastic force, driving the latch 31 back to the initial position, so that the clamping unit 3 returns to the clamped state, thereby firmly clamping the PCB6.

[0046] In the description of this utility model, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0048] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0049] Although the description of this utility model has been given in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. A pneumatic fixture mechanism for SMT placement, characterized in that, The device includes a pneumatic fixture assembly and a surface mount fixture. The surface mount fixture is provided with multiple clamping units, which are used to clamp PCBs mounted on the surface mount fixture. The pneumatic fixture assembly includes a fixture base and multiple drive components. The surface mount fixture is detachably mounted on the fixture base. The drive components can drive the clamping units to switch between a clamping state and a releasing state.

2. The SMT placement pneumatic fixture mechanism according to claim 1, characterized in that, The drive assembly includes a drive element, a connecting block, and a push rod. The connecting block is connected to the output end of the drive element, and the push rod is connected to the connecting block. The push rod is used to drive the clamping unit to open so that the PCB can be placed.

3. The SMT placement pneumatic fixture mechanism according to claim 2, characterized in that, The patch fixture has multiple mounting slots, the clamping unit is mounted on the mounting slots, the mounting slots have elongated holes, and the push rod is movably inserted through the elongated holes.

4. The SMT placement pneumatic fixture mechanism according to claim 3, characterized in that, The clamping unit includes a buckle, an elastic element, and a cover plate. At least two of the elastic elements have one end connected to the buckle and the other end connected to the inner sidewall of the mounting groove. The cover plate covers the buckle and the elastic element and is locked onto the mounting groove. The buckle has a connecting hole for the push rod to pass through.

5. The SMT placement pneumatic fixture mechanism according to claim 4, characterized in that, The side of the buckle that is in contact with the PCB has a toothed structure.

6. The SMT placement pneumatic fixture mechanism according to claim 2, characterized in that, The fixture base includes a base plate and side plates surrounding the base plate. The base plate has multiple sets of mounting holes, and the drive component is connected to the mounting holes via fasteners.

7. The SMT placement pneumatic fixture mechanism according to claim 6, characterized in that, The mounting hole is oblong.

8. The SMT placement pneumatic fixture mechanism according to claim 1, characterized in that, The pneumatic fixture assembly also includes a pressure plate and a connecting plate. The connecting plate is mounted on the fixture base, and the pressure plate is rotatably connected to the connecting plate. The pressure plate is used to flatten the PCB.

9. The SMT placement pneumatic fixture mechanism according to claim 1, characterized in that, The fixture base is provided with a number of limiting blocks, and at least four L-shaped limiting blocks are located at the four corners of the patch fixture.

10. The SMT placement pneumatic fixture mechanism according to claim 2, characterized in that, It also includes a control valve, which is mounted on the fixture base. The air inlet of the control valve is connected to an air source, and the air outlet of the control valve is connected to multiple drive components through an air path.

Images