Automatic screw locking device

Abstract

The utility model provides an automatic screw locking device, which belongs to the technical field of product processing, and comprises a rack, a conveying mechanism, a lifting mechanism, an assembly positioning plate, a manipulator, a screw locking mechanism, a first visual inspection device and a second visual inspection device, the conveying mechanism is used for conveying a to-be-locked nail piece; the lifting mechanism is used for lifting the to-be-locked nail piece on the conveying mechanism; the assembly positioning plate, the second visual inspection device and the manipulator are arranged on the rack and correspond to the lifting mechanism, and a plurality of assembly positioning holes are formed in the assembly positioning plate; the screw locking mechanism is arranged on the manipulator, and the first visual inspection device is used for identifying the assembly positioning hole and is arranged on the screw locking mechanism; the second visual detection device is used for recognizing the picking state of the screws on the screw locking mechanism, and the screw locking effect on the to-be-locked part is further ensured.

Description

Technical Field

[0001] This utility model belongs to the field of product processing technology, and in particular relates to an automatic screw locking device. Background Technology

[0002] Automatic screw fastening devices utilize various electric and pneumatic components to automatically feed, tighten, and inspect screws. This equipment simplifies the screw fastening process, reducing the number of manual workers and minimizing human error, thereby freeing up labor and lowering labor costs. This reduces product assembly costs and also prevents the generation of defective products due to low proficiency or lack of focus in manual screw fastening.

[0003] While existing automatic screw fastening devices are relatively automated in screw fastening, they are still subject to mechanical structure influences during the screw fastening process, resulting in screw fastening errors. The resulting defective products increase product assembly costs and reduce the product yield rate, a problem that urgently needs to be solved. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide an automatic screw-locking device to solve the problems in the prior art.

[0005] To achieve the above and other related objectives, this utility model provides an automatic screw-locking device, comprising:

[0006] frame;

[0007] A conveying mechanism is disposed on the frame along a first direction, and the conveying mechanism is used to convey the nail to be locked, wherein the first direction is the conveying direction of the conveying mechanism;

[0008] A lifting mechanism is provided on the conveying track of the conveying mechanism, and the lifting mechanism is used to lift the nail to be locked on the conveying mechanism;

[0009] An assembly positioning plate is provided on the frame and corresponding to the lifting mechanism. The assembly positioning plate is provided with a plurality of assembly positioning holes.

[0010] A robotic arm, which is mounted on the frame;

[0011] A screw-locking mechanism, which is mounted on the robotic arm.

[0012] A first visual inspection device is used to identify the assembly positioning hole, and the first visual inspection device is disposed on the screw locking mechanism.

[0013] A second vision inspection device is used to identify the picking status of screws on the screw-locking mechanism. The second vision inspection device is mounted on the frame.

[0014] Optionally, the automatic screw fastening device further includes a mounting support assembly disposed on the frame, wherein the assembly positioning plate is disposed on the frame via the mounting support assembly, and the mounting support assembly is detachably connected to the assembly positioning plate.

[0015] Optionally, the mounting support assembly includes a mounting frame surrounding the edge of the assembly positioning plate, and the mounting frame has an overlapping structure for assembling the assembly positioning plate.

[0016] Optionally, the overlapping structure includes two receiving slots extending along the first direction on the mounting frame, the two receiving slots being used to respectively accommodate the opposite edges of the assembly positioning plate.

[0017] Optionally, the mounting support assembly further includes a mounting frame disposed on the frame, the mounting bracket being suspended on the mounting frame by bolts and nuts, and the mounting bracket having an inlet for removing the assembly positioning plate, the assembly positioning plate entering or exiting the receiving slot through the inlet.

[0018] Optionally, the assembly positioning plate is provided with a handle on the side corresponding to the inlet.

[0019] Optionally, the assembly positioning plate is provided with a first positioning hole, the mounting bracket is provided with a connecting ear corresponding to the assembly positioning plate, the connecting ear is provided with a second positioning hole corresponding to the first positioning hole, the assembly positioning plate is provided with a second positioning hole corresponding to the first positioning hole, the first positioning hole and the second positioning hole have the same hole direction, and a positioning post is provided in both the first positioning hole and the second positioning hole.

[0020] Optionally, the conveying mechanism includes a first transmission track and a second transmission track spaced apart along a second direction. Both the first and second transmission tracks extend along the first direction and jointly convey the nail to be locked. The second direction is perpendicular to the first direction. The lifting mechanism is disposed between the first and second transmission tracks. The lifting mechanism includes a lifting cylinder and a lifting plate connected to the lifting cylinder. The lifting cylinder drives the lifting plate to reciprocate along a third direction, which is perpendicular to both the first and second directions.

[0021] Optionally, the screw-locking mechanism includes a mounting base, an electric screwdriver, a lifting and adjusting drive connected to the electric screwdriver, and a screw suction tube. The mounting base is connected to the robotic arm. The lifting and adjusting drive and the screw suction tube are both mounted on the mounting base. The output end of the electric screwdriver passes through the screw suction tube along the hole. The lifting and adjusting drive drives the electric screwdriver to reciprocate along the hole of the screw suction tube. A buffer spring is provided inside the screw suction tube and is arranged along the axial direction of the screw suction tube. One end of the buffer spring is connected to the screw suction tube, and the other end of the buffer spring is connected to the output end of the electric screwdriver. The output end of the electric screwdriver passes through the buffer spring.

[0022] Optionally, the screw-locking mechanism further includes a limiting rail disposed on the mounting base plate and a slider disposed on the limiting rail, wherein the electric screwdriver is connected to the slider.

[0023] As described above, the automatic screw-locking device of this utility model has the following beneficial effects:

[0024] By setting up an assembly positioning plate and a first vision inspection device, the locking position on the component to be locked can be located by identifying the conversion positioning holes on the assembly positioning plate. At the same time, by setting up a second vision inspection device, it is possible to detect whether the screw picked up by the screw-locking mechanism is in an upright state, so as to further ensure the locking effect of the component to be locked, improve the yield rate in the locking process, and reduce the assembly cost of the product. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the automatic screw-locking device according to an embodiment of the present invention.

[0026] Figure 2 This is a top view of the automatic screw-locking device according to an embodiment of the present invention.

[0027] Figure 3 This is a schematic diagram of the conveying mechanism and mounting support assembly according to an embodiment of the present utility model.

[0028] Figure 4 for Figure 3 Enlarged diagram of point A in the middle.

[0029] Figure 5 This is a schematic diagram of the lifting mechanism according to an embodiment of the present invention.

[0030] Figure 6 This is one of the structural schematic diagrams of the screw-locking mechanism and the first vision detection device according to an embodiment of the present utility model.

[0031] Figure 7The second schematic diagram shows the structure of the screw-locking mechanism and the first visual inspection device according to an embodiment of this utility model.

[0032] Labeling Explanation: 1. Screw Locking Mechanism; 101. Electric Screwdriver; 102. Limiting Rail; 103. Mounting Base; 104. Screw Suction Tube; 2. Feeder; 3. Robot Arm; 4. Frame; 5. Mounting Support Assembly; 501. Mounting Frame; 502. Positioning Post; 503. Connecting Ear; 504. Placement Frame; 6. Conveying Mechanism; 601. First Transmission Rail; 602. Second Transmission Rail; 7. Pallet; 8. Lifting Mechanism; 801. Lifting Cylinder; 802. Cylinder Mounting Assembly; 803. Lifting Pallet; 804. Limiting Sleeve; 805. Limiting Post; 9. Assembly Positioning Plate; 10. Handle; 11. Second Vision Inspection Device; 12. First Vision Inspection Device. Detailed Implementation

[0033] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0034] Please see Figures 1 to 7 It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0035] In order to describe this utility model in detail, the following is a specific description of an automatic screw-locking device according to this utility model:

[0036] Please combine Figure 1 , Figure 2 and Figure 6As shown, this utility model provides an automatic screw fastening device, including a frame 4, a conveying mechanism 6, a lifting mechanism 8, an assembly positioning plate 9, a robot arm 3, a screw fastening mechanism 1, a first vision detection device 12, and a second vision detection device 11. The conveying mechanism 6 is disposed on the frame 4 along a first direction and is used to convey the screw to be fastened. The first direction is the conveying direction of the conveying mechanism 6. The lifting mechanism 8 is disposed on the conveying trajectory of the conveying mechanism 6 and is used to lift the screw to be fastened on the conveying mechanism 6. The assembly positioning plate 9 is disposed on the frame 4 and is disposed corresponding to the lifting mechanism 8. The assembly positioning plate 9 is provided with a plurality of assembly positioning holes. The robot arm 3 is disposed on the frame 4. The screw fastening mechanism 1 is disposed on the robot arm 3. The first vision detection device 12, used to identify the assembly positioning holes, is disposed on the screw fastening mechanism 1. The second vision detection device 11 is used to identify the picking state of the screw on the screw fastening mechanism 1 and is disposed on the frame 4. By setting up an assembly positioning plate 9 and a first vision inspection device 12, the locking position on the part to be locked can be found by identifying the transfer positioning holes on the assembly positioning plate 9. At the same time, by setting up a second vision inspection device 11, it is possible to detect whether the screw picked up by the screw locking mechanism 1 is in an upright state, so as to further ensure the locking effect of the part to be locked, improve the yield rate in the locking process, and reduce the assembly cost of the product.

[0037] Please combine Figure 3 and Figure 4 As shown, the automatic screw fastening device also includes a mounting support assembly 5 mounted on the frame 4. The assembly positioning plate 9 is mounted on the frame 4 via the mounting support assembly 5, and the mounting support assembly 5 is detachably connected to the assembly positioning plate 9. This detachable connection between the mounting support assembly 5 and the assembly positioning plate 9 allows for selection of a suitable screw to be fastened when the model or type of the screw to be fastened changes. This increases the compatibility of the automatic screw fastening device with different models and types of screws, enhancing its practicality and applicability.

[0038] The mounting support assembly 5 includes a mounting frame 504, which surrounds the edge of the assembly positioning plate 9. The mounting frame 504 has an overlapping structure for assembling the assembly positioning plate 9. The overlapping structure facilitates the assembly and disassembly of the assembly positioning plate 9. In this embodiment, the overlapping structure includes two receiving grooves extending along a first direction on the mounting frame 504, which respectively accommodate opposite edges of the assembly positioning plate 9. The positioning plate is easily loaded and unloaded using these receiving grooves. Furthermore, a first limiting step is provided on each edge of the assembly positioning plate 9 corresponding to the receiving groove, abutting against the opening of the receiving groove to further limit the positioning of the assembly positioning plate 9. In some embodiments, a second limiting step is provided on the mounting frame 504, and the assembly positioning plate 9 overlaps on the second limiting step.

[0039] In detail, the mounting support assembly 5 also includes a mounting frame 501, which is mounted on the frame 4. A mounting bracket 504 is suspended from the mounting frame 501 by bolts and nuts. The mounting bracket 504 has an inlet for removing and releasing the assembly positioning plate 9, through which the assembly positioning plate 9 enters or exits the receiving slot. By suspending the bracket on the mounting frame 501, the distance between the mounting bracket 504 and the top surface of the mounting frame 501 can be adjusted by adjusting the bolts and nuts, thereby adjusting the distance between the assembly positioning plate 9 and the top surface of the mounting frame 501 to accommodate different assembly requirements.

[0040] In this embodiment, a handle 10 is provided on the side of the assembly positioning plate 9 corresponding to the inlet. The handle 10 allows workers to easily replace the corresponding assembly positioning plate 9 according to the model or type of the part to be locked. In some embodiments, the handle 10 is also provided with anti-slip rubber, and anti-slip strips are provided on the anti-slip rubber.

[0041] The assembly positioning plate 9 has a first positioning hole, and the mounting bracket 504 has a connecting lug 503 corresponding to the assembly positioning plate 9. The connecting lug 503 has a second positioning hole corresponding to the first positioning hole, and the assembly positioning plate 9 also has a second positioning hole corresponding to the first positioning hole. The first and second positioning holes are aligned, and a positioning post 502 passes through both the first and second positioning holes. By setting the first positioning hole, the second positioning hole, and the positioning post 502, the relative positions of the mounting bracket 504 and the assembly positioning plate 9 can be positioned, avoiding the situation where the positioning of the locking pin is incorrect due to the error in the relative position between the placed assembly positioning plate 9 and the mounting bracket 504 when replacing different types or models of assembly positioning plates 9.

[0042] In this embodiment, the conveying mechanism 6 includes a first transmission track 601 and a second transmission track 602 spaced apart along a second direction. Both the first transmission track 601 and the second transmission track 602 extend along a first direction and jointly convey the workpiece to be locked. The second direction is perpendicular to the first direction. A lifting mechanism 8 is disposed between the first conveying track and the second transmission track 602. The lifting mechanism 8 includes a lifting cylinder 801 and a lifting plate 803 connected to the lifting cylinder 801. The lifting cylinder 801 drives the lifting plate 803 to reciprocate along a third direction, which is perpendicular to both the first and second directions. By setting up the lifting mechanism 8, the workpiece to be locked can be lifted to the locking position for the locking process, while simultaneously disengaging from the first transmission track 601 and the second transmission track 602. After the locking process is completed, the lifting cylinder 801 moves down, and the lifting plate 803 carries the workpiece back onto the first transmission track 601 and the second transmission track 602, where it continues to be conveyed to the next process position.

[0043] like Figure 5As shown, in this embodiment, the lifting cylinder 801 on the lifting mechanism 8 is mounted on the frame 4 via the cylinder mounting assembly 802. The piston rod of the lifting cylinder 801 is connected to the lifting plate 803. The lifting plate 803 is used to lift and lower the tray 7. The lifting plate 803 has a lifting position and a ready position. Under the drive of the lifting cylinder 801, the lifting plate 803 reciprocates between the lifting position and the ready position. When the lifting plate 803 is in the lifting position, the locking part reaches the locking pin position. When the lifting plate 803 is in the ready position, the tray 7 carries the locking part to be moved on the conveying mechanism 6. The cylinder mounting assembly 802 is also provided with a limiting sleeve 804, and the lifting plate 803 is provided with a limiting post 805 corresponding to the limiting sleeve 804. The limiting post 805 slides in the limiting sleeve 804 to guide the movement trajectory of the lifting plate 805, so as to avoid the nail to be locked from shifting during the lifting process, which would result in poor locking effect.

[0044] like Figure 6 and Figure 7 As shown, the screw-locking mechanism 1 includes a mounting base 103, an electric screwdriver 101, a lifting and adjusting drive connected to the electric screwdriver 101, and a screw suction tube 104. The mounting base 103 is connected to the robotic arm. The lifting and adjusting drive and the screw suction tube 104 are both mounted on the mounting base 103. The output end of the electric screwdriver 101 passes through the screw suction tube 104 along the hole. The lifting and adjusting drive drives the electric screwdriver 101 to reciprocate along the hole of the screw suction tube 104. A buffer spring is provided inside the screw suction tube 104 along the axial direction of the screw suction tube 104. One end of the buffer spring is connected to the screw suction tube 104, and the other end of the buffer spring is connected to the output end of the electric screwdriver 101. The output end of the electric screwdriver 101 passes through the buffer spring. By setting the screw suction tube 104, the movement trajectory of the screw can be guided during the screw-locking process, so that the screw can enter the required screw-locking position of the workpiece. By setting the buffer spring, the buffer spring has the functions of resetting, shock absorption, buffering and maintaining the locked state. After the screw-locking mechanism 1 completes the screw-locking step, the buffer spring can help the electric screwdriver 101 return to the ready screw-locking position, ensuring the screw-locking process is carried out. At the same time, the buffer spring can absorb and mitigate the impact force during the screw-locking process, so that the electric screwdriver 101 reduces the damage to other components in the screw-locking mechanism 1, and improves the stability and service life of the automatic screw-locking device during use.

[0045] The screw-locking mechanism 1 also includes a limiting rail 102 mounted on the mounting base plate and a slider mounted on the limiting rail 102, with the electric screwdriver 101 connected to the slider. By setting the limiting rail 102 and the slider, the movement trajectory of the electric screwdriver 101 can be guided, ensuring the correctness of the screw-locking path of the electric screwdriver 101, thereby improving the screw-locking operation and enhancing the stability of the automatic screw-locking device during use.

[0046] In this embodiment, the feeder 2 is mounted on the frame 4 and located on one side of the robot arm 3, and is used to supply screws to the robot arm 3. It can be understood that the type of feeder 2 is adjusted according to the different types of screws, such as tray 7 feeder 2, vibratory feeder 2, and row feeder 2.

[0047] When the automatic screw fastening device is in operation, the conveying mechanism 6 transports the screw to be fastened to the lifting mechanism 8 via the tray 7. The lifting mechanism 8 lifts the tray 7 and the screw to be fastened on the conveying mechanism 6 to the fastening position. At the same time, the robotic arm 3 drives the screw fastening mechanism 1 to pick up the screw at the feeder 2 by vacuum suction. The picked-up screw is located in the screw suction tube 104. The robotic arm 3 drives the screw fastening mechanism 1 to the upper part of the second vision detection device 11. The second vision detection device 11 detects whether the screw picking is normal. If it is abnormal, it feeds back to the robotic arm 3 and the screw fastening mechanism 1, discards the screw, and then picks up another one. If a new screw is picked up normally, the robotic arm 3, along with the screw-locking mechanism 1, positions itself directly above the assembly positioning plate 9. Using the first vision detection device 12, it detects the assembly positioning hole on the assembly positioning plate 9, obtains the positioning point, and then inserts the screw suction tube 104 into the hole according to that point. The electric screwdriver 101 is then lowered via the lifting adjustment drive to perform the screw-locking operation. After the screw-locking operation is completed, the robotic arm 3 extends the screw suction tube 104 out of the assembly positioning hole and performs another screw-picking operation. This process is repeated until all screws on the workpiece are assembled. The lifting mechanism 8 lowers the tray 7 and the screwed workpiece onto the conveying mechanism 6, allowing the conveying mechanism 6 to transport the screwed workpiece from the tray 7 to the next work point for assembly processing.

[0048] In summary, by setting up the assembly positioning plate 9 and the first vision inspection device 12, the locking position on the part to be locked can be found by identifying the conversion positioning holes on the assembly positioning plate 9. At the same time, by setting up the second vision inspection device 11, it is possible to detect whether the screw picked up by the screw locking mechanism 1 is in an upright state, so as to further ensure the locking effect of the part to be locked, improve the yield rate in the locking process, and reduce the assembly cost of the product.

[0049] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. An automatic screw-locking device, characterized in that, include: frame; A conveying mechanism is disposed on the frame along a first direction, and the conveying mechanism is used to convey the nail to be locked, wherein the first direction is the conveying direction of the conveying mechanism; A lifting mechanism is provided on the conveying track of the conveying mechanism, and the lifting mechanism is used to lift the nail to be locked on the conveying mechanism; An assembly positioning plate is provided on the frame and corresponding to the lifting mechanism. The assembly positioning plate is provided with a plurality of assembly positioning holes. A robotic arm, which is mounted on the frame; A screw-locking mechanism, which is mounted on the robotic arm. A first visual inspection device is used to identify the assembly positioning hole, and the first visual inspection device is disposed on the screw locking mechanism. A second vision inspection device is used to identify the picking status of screws on the screw-locking mechanism. The second vision inspection device is mounted on the frame.

2. The automatic screw-locking device according to claim 1, characterized in that: The automatic screw fastening device also includes a mounting support assembly disposed on the frame, and the assembly positioning plate is disposed on the frame through the mounting support assembly, and the mounting support assembly is detachably connected to the assembly positioning plate.

3. The automatic screw-locking device according to claim 2, characterized in that: The mounting support assembly includes a mounting frame that surrounds the edge of the assembly positioning plate and has an overlapping structure for assembling the assembly positioning plate.

4. The automatic screw-locking device according to claim 3, characterized in that: The overlapping structure includes two receiving slots extending along the first direction on the mounting frame, the two receiving slots being used to respectively accommodate the opposite edges of the assembly positioning plate.

5. The automatic screw-locking device according to claim 4, characterized in that: The mounting support assembly also includes a mounting frame, which is mounted on the frame. The mounting bracket is suspended on the mounting frame by bolts and nuts. The mounting bracket has an inlet for removing the assembly positioning plate, through which the assembly positioning plate enters or exits the receiving slot.

6. The automatic screw-locking device according to claim 5, characterized in that: The assembly positioning plate is provided with a handle on the side corresponding to the inlet.

7. The automatic screw-locking device according to claim 3 or 4, characterized in that: The assembly positioning plate has a first positioning hole, the mounting bracket has a connecting ear corresponding to the assembly positioning plate, the connecting ear has a second positioning hole corresponding to the first positioning hole, the assembly positioning plate has a second positioning hole corresponding to the first positioning hole, the first positioning hole and the second positioning hole have the same hole direction, and a positioning post is inserted through the first positioning hole and the second positioning hole.

8. The automatic screw-locking device according to any one of claims 1-6, characterized in that: The conveying mechanism includes a first transmission track and a second transmission track spaced apart along a second direction. Both the first and second transmission tracks extend along the first direction and jointly convey the nail to be locked. The second direction is perpendicular to the first direction. The lifting mechanism is disposed between the first and second transmission tracks. The lifting mechanism includes a lifting cylinder and a lifting plate connected to the lifting cylinder. The lifting cylinder drives the lifting plate to reciprocate along a third direction. The third direction is perpendicular to both the first and second directions.

9. The automatic screw-locking device according to claim 1, characterized in that: The screw-locking mechanism includes a mounting base, an electric screwdriver, a lifting and adjusting drive connected to the electric screwdriver, and a screw suction tube. The mounting base is connected to the robotic arm. The lifting and adjusting drive and the screw suction tube are both mounted on the mounting base. The output end of the electric screwdriver passes through the screw suction tube along the hole in the screw suction tube. The lifting and adjusting drive drives the electric screwdriver to reciprocate along the hole in the screw suction tube. A buffer spring is provided inside the screw suction tube and is arranged axially along the screw suction tube. One end of the buffer spring is connected to the screw suction tube, and the other end of the buffer spring is connected to the output end of the electric screwdriver. The output end of the electric screwdriver passes through the buffer spring.

10. The automatic screw-locking device according to claim 9, characterized in that: The screw-locking mechanism also includes a limiting rail disposed on the mounting base plate and a slider disposed on the limiting rail, wherein the electric screwdriver is connected to the slider.

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