A screw automatic tightening device and PCBA board automatic tightening equipment

Abstract

The utility model discloses a kind of screw automatic tightening device and PCBA board automatic tightening equipment, screw automatic tightening device includes transport unit, supporting unit, tightening unit and three-dimensional movement unit, transport unit is used to transport workpiece;Supporting unit is arranged on the transport path of transport unit, supporting unit includes supporting lifting mechanism and supporting plate, supporting lifting mechanism is connected with supporting plate transmission to drive supporting plate to move upwards and lift workpiece;Tightening unit includes tightening module and feeding module, and tightening module includes tightening mechanism and tightening head, and tightening mechanism is used to screw screw in tightening head;Feeding module is communicated with tightening head, for supplying screw to tightening head;Three-dimensional movement unit is connected with tightening module transmission, to drive tightening module to move to processing position.PCBA board automatic tightening equipment can automatically tighten screw on PCBA board, replace manual tightening, improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of PCBA board production equipment, specifically to an automatic screw tightening device and an automatic PCBA board tightening equipment. Background Technology

[0002] Printed circuit boards, also known as printed circuit boards or printed circuit boards, are important electronic components. They serve as the support for electronic components and provide the connections between them. Because they are manufactured using electronic printing technology, they are called "printed" circuit boards. PCBA is short for Printed Circuit Board Assembly, which refers to the PCBA board obtained after a bare PCB has undergone surface mount technology (SMT) or DIP (Dual In-line Package) assembly.

[0003] Different PCBA boards have different designs, resulting in different screw placements. Therefore, current technology generally uses manual tightening. As PCBA boards become more complex, the number of screws requiring tightening increases, and relying on manual tightening significantly slows down production efficiency. Utility Model Content

[0004] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose an automatic screw tightening device and an automatic PCBA board tightening equipment to solve the technical problem that the efficiency of manual tightening in the prior art is too low.

[0005] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: In a first aspect, this utility model provides an automatic screw tightening device, comprising: a transport unit, a support unit, a tightening unit, and a three-dimensional motion unit. The transport unit is used to transport workpieces; The supporting unit is arranged on the transport path of the transport unit. The supporting unit includes a supporting lifting mechanism and a pallet. The supporting lifting mechanism is connected to the pallet in a transmission manner to drive the pallet to move upward and lift the workpiece. The tightening unit includes a tightening module and a feeding module. The tightening module includes a tightening mechanism and a tightening head. The tightening mechanism is used to tighten the screw inside the tightening head. The feeding module is connected to the tightening head and is used to supply screws into the tightening head. The three-dimensional motion unit is connected to the tightening module to drive the tightening module to the processing position.

[0006] In some embodiments, the transport unit includes two parallel, spaced-apart conveyor belts for carrying both sides of the workpiece, respectively, and the support unit is arranged between the two conveyor belts.

[0007] In some embodiments, the transport unit further includes a material blocking assembly disposed between the two conveyor belts. The material blocking assembly includes a material blocking lifting mechanism, a connecting member, and a blocking member. The connecting member is fixedly connected to the fixed end of the material blocking lifting mechanism and is also rotatably connected to the blocking member. The lifting end of the material blocking lifting mechanism movably abuts against the blocking member to push the blocking member to rotate.

[0008] In some embodiments, a plurality of the material blocking components are arranged sequentially at intervals along the conveyor belt transmission direction, and each material blocking component is provided with the supporting unit, the tightening unit and the three-dimensional motion unit.

[0009] In some embodiments, the support unit further includes a plurality of positioning pins, which are fixedly connected to the support plate and are used to be inserted into the positioning holes of the workpiece.

[0010] In some embodiments, the support unit further includes a barcode scanner, the tray having a notch, and the barcode scanner being arranged toward the notch to scan an identification code on the workpiece through the notch.

[0011] In some embodiments, the three-dimensional motion unit is arranged above the transport unit and includes a Y-axis motion module, an X-axis motion module, and a Z-axis motion module connected in sequence. The Y-axis motion module is arranged perpendicular to the conveyor belt, the X-axis motion module is arranged parallel to the conveyor belt, and the Z-axis motion module is arranged in a vertical direction. The Z-axis motion module is connected to the tightening module.

[0012] In some embodiments, the tightening head includes a mounting base, two grippers, and a return spring. The mounting base is fixedly connected to the fixed end of the Z-axis motion module. The two grippers are arranged opposite each other and their upper ends are rotatably connected to the mounting base. A receiving space for accommodating a screw is formed between the two grippers. The return spring connects the two grippers. When the return spring is in its natural state, a gap is formed at the lower ends of the two grippers. The gap allows the shank of the screw to pass through but blocks the head of the screw. The feeding module communicates with the receiving space.

[0013] In some embodiments, the tightening mechanism includes a tightening motor and a tightening rod. The tightening motor is fixedly connected to the moving end of the Z-axis motion module. The rotating shaft of the tightening motor is coaxially fixedly connected to the upper end of the tightening rod. The lower end of the tightening rod passes through the mounting base and extends into the receiving space for tightening screws.

[0014] Secondly, this utility model also provides an automatic PCBA board tightening device, including an automatic screw tightening device.

[0015] Compared with the prior art, the automatic screw tightening device provided by this utility model transports the workpiece, i.e., the PCBA board, to a suitable position through a transport unit. The support unit moves upward to lift the PCBA board, providing a good support environment for tightening the screws. The three-dimensional motion unit drives the tightening unit to move sequentially to the position of the screw. The tightening unit automatically tightens the screws on the PCBA board, replacing manual tightening and improving production efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the automatic screw tightening device provided in this embodiment of the utility model; Figure 2 yes Figure 1 Schematic diagram of the structure of the medium-speed transport unit; Figure 3 yes Figure 2 Schematic diagram of the middle baffle assembly; Figure 4 yes Figure 1 Schematic diagram of the structure of the central support unit; Figure 5 yes Figure 1 A schematic diagram of the structure of a three-dimensional motion unit; Figure 6 yes Figure 1 Schematic diagram of the tightening module; Figure 7 yes Figure 1 Schematic diagram of the central feeding module; Figure 8 This is a structural schematic diagram of the automatic PCBA board tightening device provided in this embodiment of the utility model. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0018] To address the technical problem of low efficiency in manually tightening screws on PCBA boards, this utility model provides an automatic screw tightening device and an automatic PCBA board tightening equipment, which can achieve automatic screw tightening.

[0019] Please see Figures 1 to 7 ,in Figure 1This is a schematic diagram of the automatic screw tightening device provided in this embodiment of the utility model. The automatic screw tightening device includes a transport unit 1, a support unit 2, a three-dimensional motion unit 3, and a tightening unit 4.

[0020] Transport unit 1 is used to transport workpiece 5, i.e., PCBA board.

[0021] The support unit 2 is arranged on the transport path of the transport unit 1. The support unit 2 includes a support lifting mechanism 21 and a pallet 22. The support lifting mechanism 21 is connected to the pallet transmission 22 to drive the pallet 22 to move upward to lift the workpiece 5, providing a good support environment for tightening screws.

[0022] The three-dimensional motion unit 3 is connected to the tightening module 41 in the tightening unit 4 to drive the tightening module 41 to the processing position.

[0023] The tightening unit 4 includes a tightening module 41 and a feeding module 42. The tightening module 41 includes a tightening mechanism 411 and a tightening head 412. The tightening mechanism 411 is used to tighten the screw inside the tightening head 412. The feeding module 42 is connected to the tightening head 412 and is used to supply screws into the tightening head 412.

[0024] The automatic screw tightening device transports workpiece 5 to a suitable position via transport unit 1. Support unit 2 moves upward to lift the PCBA board, providing a good support environment for tightening the screws. Three-dimensional motion unit 3 drives tightening unit 4 to move sequentially to the position of the screws. Tightening unit 4 automatically tightens the screws on the PCBA board, replacing manual tightening and improving production efficiency.

[0025] Please see Figure 2 , Figure 2 yes Figure 1 A schematic diagram of the transport unit is shown. In some embodiments, the transport unit 1 includes two parallel conveyor belts 11 spaced apart, which respectively support the two sides of the workpiece 5. The two conveyor belts 11 move synchronously. A support unit 2 is arranged between the two conveyor belts 11. When the conveyor belts 11 carrying the workpiece 5 move to the processing position, that is, directly above the support unit 2, the support unit 2 lifts the workpiece 5 upward, separating the workpiece 5 from the conveyor belts 11. Then, the three-dimensional motion unit 3 and the tightening unit 4 tighten screws on the workpiece 5. After processing the outer wall, the support unit 2 descends, causing the workpiece 5 to fall back onto the conveyor belts 11, and the conveyor belts 1 carry the workpiece 5 away.

[0026] Please see Figure 2 and Figure 3 In some embodiments, the transport unit 1 further includes a baffle assembly 12, which is disposed between the two conveyor belts 11 to block the workpiece 5 and stop the workpiece 5 so that the support unit 2 can lift the workpiece 5.

[0027] The material blocking assembly 12 includes a material blocking lifting mechanism 121, a connecting member 122, and a blocking member 123. The material blocking lifting mechanism 121 can be a common reciprocating linear drive device such as a cylinder or an electric push rod. The connecting member 122 is fixedly connected to the fixed end of the material blocking lifting mechanism 121, and the connecting member 122 is also rotatably connected to the blocking member 123. The lifting end of the material blocking lifting mechanism 121 movably abuts against the blocking member 123 to push the blocking member 123 to rotate, so that the blocking member 123 blocks the workpiece 5 or releases the workpiece 5.

[0028] In this embodiment, when the lifting end of the material blocking mechanism 121 is at a low position, the blocking end 123a of the blocking member 123 is at a high position, blocking the workpiece 5. The lifting end of the material blocking mechanism 121 rises upwards, pushing... Figure 3 The blocking member 123 rotates clockwise, causing its blocking end 123a to descend, making room for the workpiece 5 to pass. In other embodiments, the contact position between the material blocking lifting mechanism 121 and the blocking member 123 can be changed, so that the lifting end of the material blocking lifting mechanism 121 rises, the blocking member 123 blocks the workpiece 5, and the lifting end of the material blocking lifting mechanism 121 descends, allowing the workpiece 5 to pass.

[0029] In a preferred embodiment, a roller is provided at the blocking end 123a, and the roller contacts the workpiece 5. In this way, during the lifting and lowering process of the material blocking mechanism 121, the blocking member 123 rolls and rubs against the workpiece 5 through the roller, which greatly reduces the friction and avoids damage to the workpiece.

[0030] See you again Figure 2 In a preferred embodiment, the conveyor belt 11 is also provided with a baffle 13. When the supporting unit 2 lifts the workpiece 5, the baffle 13 cooperates with the supporting unit 2 to clamp the workpiece 5.

[0031] In a preferred embodiment, multiple baffle assemblies 12 are arranged sequentially at intervals along the conveyor belt 11. Each baffle assembly 12 is equipped with a supporting unit 2, a tightening unit 3, and a three-dimensional motion unit 4. This allows multiple workpieces to be processed simultaneously, improving production efficiency.

[0032] Please see Figure 4 , Figure 4 yes Figure 1 A schematic diagram of the supporting unit. The supporting unit 2 includes a supporting lifting mechanism 21 and a pallet 22. The supporting lifting mechanism 21 can be a common device that provides reciprocating linear drive, such as a cylinder or an electric push rod. The supporting lifting mechanism 21 drives the pallet 22 to move up and down.

[0033] In some embodiments, the supporting unit 2 further includes a plurality of guide posts 23, the upper ends of which are fixedly connected to the support plate 22 and the lower ends are slidably connected to the base plate. The guide posts 23 assist in the lifting and lowering of the support plate 22.

[0034] The supporting unit 2 also includes multiple positioning pins 24, which are fixedly connected to the support plate 22 and are used to be inserted into the corresponding positioning holes on the workpiece 5 for positioning the workpiece 5.

[0035] In some embodiments, the support unit 2 further includes a barcode scanner 25. The pallet 22 has a notch 22a, and the barcode scanner 25 is positioned facing the notch 22a to scan the identification code on the workpiece 5 through the notch 22a, and then transmits the information back to the control system. If the scanning fails, the system will refuse to tighten and will sound an alarm.

[0036] Please see Figure 5 , Figure 5 yes Figure 1 A schematic diagram of the three-dimensional motion unit. In some embodiments, the three-dimensional motion unit 3 is arranged above the transport unit 1, including a Y-axis motion module 31, an X-axis motion module 32, and a Z-axis motion module 33 connected in sequence. The Y-axis motion module 31 is arranged perpendicular to the conveyor belt 11, the X-axis motion module 32 is arranged parallel to the conveyor belt 11, and the Z-axis motion module 33 is arranged vertically. The Z-axis motion module 33 is connected to the tightening module 41. The Y-axis motion module 31 and the X-axis motion module 32 work together to move the tightening module 41 to directly above the position where the screw needs to be tightened, and the Z-axis motion module 33 drives the tightening module 41 to move downward to tighten the screw onto the workpiece 5. The Y-axis motion module 31, the X-axis motion module 32, and the Z-axis motion module 33 can all adopt existing mature linear motion modules, such as ball screw mechanisms, and cooperate with slide rails and other structures to achieve linear reciprocating motion in the X, Y, and Z directions. This application does not limit the specific structure and working principle of the motion module, as long as it can realize the function of linear reciprocating motion.

[0037] Please see Figure 6 and Figure 7 , Figure 6 yes Figure 1 Schematic diagram of the tightening module; Figure 7 yes Figure 1 A schematic diagram of the material supply module.

[0038] The tightening unit 4 includes a tightening module 41 and a feeding module 42. The tightening module 41 includes a tightening mechanism 411 and a tightening head 412. The tightening mechanism 411 includes a tightening motor 4111 and a tightening rod 4112. The tightening motor 4111 is fixedly connected to the moving end of the Z-axis motion module 33, which can drive the tightening motor 4111 to perform lifting and lowering movements. The rotation shaft of the tightening motor 4111 is coaxially fixedly connected to the upper end of the tightening rod 4112, and the lower end of the tightening rod 4112 is used to tighten screws.

[0039] The tightening head 412 includes a mounting base 4121, two grippers 4122, and a return spring. The mounting base 4121 is fixedly connected to the fixed end of the Z-axis motion module 33, meaning the Z-axis motion module 33 cannot drive the tightening head 412 to move up and down; the tightening head 412 moves together with the Z-axis motion module 33 in the X and Y directions. The two grippers 4122 are arranged opposite each other, and their upper ends are rotatably connected to the mounting base 4121, forming a receiving space between the two grippers 4122 to accommodate the screw. The return spring connects the two grippers 4122. When the return spring is in its natural state, a gap is formed at the lower ends of the two grippers 4122, allowing the shank of the screw to pass through but blocking the head of the screw. This allows the screw to be held between the two grippers 4122.

[0040] The lower end of the tightening rod 4112 passes through the mounting base 4121 and extends into the receiving space. The Z-axis motion module 33 drives the tightening rod 4112 to move downward, so that the lower end of the tightening rod 4112 can be inserted into the head of the screw and push the screw out into the screw hole of the workpiece 5. The tightening motor 4111 drives the tightening rod 4112 to rotate to tighten the screw.

[0041] The feeding module 42 is connected to the receiving space and is used to supply screws one by one into the receiving space. The feeding module 42 can use existing mature equipment, which stores the arranged screws inside and is connected to the receiving space through pipes. The screws are delivered into the receiving space one by one by an air pump.

[0042] In a preferred embodiment, the tightening unit 4 further includes a torque sensor mounted on the tightening rod 4112. By detecting the torque of the tightening rod 4112, the screw is tightened while avoiding damage due to excessive torque. For example, the torque range of the tightening motor 4111 is controlled to be 0.3-3 Nm, and the speed is 500-2000 rpm. A displacement sensor is also provided. Based on the information obtained from scanning the barcode by the barcode scanner 25, the type of workpiece 5 is determined. Then, according to the preset processing program, the displacement of the Z-axis motion module 33 is precisely controlled to ensure that the screw is inserted into the appropriate depth in the screw hole. After tightening, the data from the displacement sensor can also be used to determine whether the screw is tightened, and the relevant data is transmitted back to the controller.

[0043] Please see Figure 8 , Figure 8 This is a structural schematic diagram of the automatic PCBA board tightening device provided in this embodiment of the utility model. The automatic PCBA board tightening device includes the aforementioned automatic screw tightening device, and also includes a housing for accommodating the automatic screw tightening device. The housing has an inlet and an outlet connecting the two ends of the conveyor belt 11. It also includes connecting and supporting structures such as plates and rods necessary for installing the automatic screw tightening device, as well as devices such as a display screen and keyboard for controlling the normal operation of the equipment.

[0044] To better understand this utility model, the following is combined with... Figures 1 to 8 The technical solution of this utility model is described in detail below: The workpiece 5 to be processed enters the PCBA board automatic tightening equipment through the feed port and moves with the conveyor belt 11. At this time, the stop assembly 12 rises, stopping the workpiece 5 at a preset position. It is easy to understand that when multiple stop assemblies 12 are set, the last stop assembly 12 rises first. When it blocks a workpiece 5, the previous stop assembly 12 rises again to block the next workpiece 5, and so on.

[0045] After the material stop assembly 12 blocks the workpiece 5, the barcode scanner 25 scans the identification code on the workpiece 5 to identify its type and retrieves the preset processing plan. Then, the support unit 2 rises to lift and fix the workpiece 5. The three-dimensional motion unit 3 drives the tightening unit 4 to move to the position where the screw needs to be tightened according to the preset processing plan. The feeding module 42 provides a screw to the tightening head 412, and the tightening module 41 tightens the screw onto the workpiece 5. Then, the three-dimensional motion unit 3 drives the tightening unit 4 to move to the next position where a screw needs to be tightened, repeating the above process until all screws are tightened. Then, the support unit 2 descends, causing the workpiece 5 to fall back onto the conveyor belt 11. The material stop assembly 12 falls down, and the workpiece 5 is sent out from the discharge port along with the conveyor belt 11, completing the processing.

[0046] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. An automatic screw tightening device, characterized in that, include: A transport unit used to transport workpieces; A support unit is arranged on the transport path of the transport unit. The support unit includes a support lifting mechanism and a pallet. The support lifting mechanism is connected to the pallet to drive the pallet to move upward and lift the workpiece. A tightening unit includes a tightening module and a feeding module. The tightening module includes a tightening mechanism and a tightening head. The tightening mechanism is used to tighten the screw inside the tightening head. The feeding module is connected to the tightening head and is used to supply screws into the tightening head. A three-dimensional motion unit is connected to the tightening module via a transmission to drive the tightening module to the processing position.

2. The automatic screw tightening device according to claim 1, characterized in that, The transport unit includes two parallel, spaced-apart conveyor belts for carrying the two sides of the workpiece respectively, and the support unit is arranged between the two conveyor belts.

3. The automatic screw tightening device according to claim 2, characterized in that, The transport unit also includes a material blocking assembly, which is disposed between the two conveyor belts. The material blocking assembly includes a material blocking lifting mechanism, a connecting member, and a blocking member. The connecting member is fixedly connected to the fixed end of the material blocking lifting mechanism, and the connecting member is also rotatably connected to the blocking member. The lifting end of the material blocking lifting mechanism movably abuts against the blocking member to push the blocking member to rotate.

4. The automatic screw tightening device according to claim 3, characterized in that, Multiple material blocking components are arranged at intervals along the conveyor belt transmission direction, and each material blocking component is provided with a supporting unit, a tightening unit and a three-dimensional motion unit.

5. The automatic screw tightening device according to claim 1, characterized in that, The support unit also includes multiple positioning pins, which are fixedly connected to the support plate and are used to be inserted into the positioning holes of the workpiece.

6. The automatic screw tightening device according to claim 1, characterized in that, The support unit also includes a barcode scanner. The tray has a notch, and the barcode scanner is positioned toward the notch to scan the identification code on the workpiece through the notch.

7. The automatic screw tightening device according to claim 2, characterized in that, The three-dimensional motion unit is arranged above the transport unit and includes a Y-axis motion module, an X-axis motion module, and a Z-axis motion module connected in sequence. The Y-axis motion module is arranged perpendicular to the conveyor belt, the X-axis motion module is arranged parallel to the conveyor belt, and the Z-axis motion module is arranged in a vertical direction. The Z-axis motion module is connected to the tightening module.

8. The automatic screw tightening device according to claim 7, characterized in that, The tightening head includes a mounting base, two grippers, and a return spring. The mounting base is fixedly connected to the fixed end of the Z-axis motion module. The two grippers are arranged opposite each other, and their upper ends are rotatably connected to the mounting base. A receiving space for accommodating a screw is formed between the two grippers. The return spring connects the two grippers. When the return spring is in its natural state, a gap is formed between the lower ends of the two grippers. The gap allows the shank of the screw to pass through, but blocks the head of the screw. The feeding module communicates with the receiving space.

9. The automatic screw tightening device according to claim 8, characterized in that, The tightening mechanism includes a tightening motor and a tightening rod. The tightening motor is fixedly connected to the moving end of the Z-axis motion module. The rotating shaft of the tightening motor is coaxially fixedly connected to the upper end of the tightening rod. The lower end of the tightening rod passes through the mounting base and extends into the receiving space for tightening screws.

10. An automatic PCBA board tightening device, characterized in that, Includes the automatic screw tightening device as described in any one of claims 1-9.

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