An automatic screw fastening device

Abstract

This utility model discloses an automatic screw fastening device, which includes: a base, a clamping fixture, and a feeding mechanism; the clamping fixture and the feeding mechanism are mounted on the base, with the clamping fixture located on one side of the feeding mechanism and the output end of the feeding mechanism facing the clamping fixture; the feeding mechanism includes multiple sets of feeding trays and multiple feeding lines, with the input end of any feeding line connected to any set of feeding trays, and the output end of any feeding line equipped with a pushing mechanism; the pushing mechanism includes: a fixed seat with a T-slot and a first driving cylinder, with a pushing block disposed within the fixed seat, and the output end of the first driving cylinder connected to the pushing block, the pushing block moving within the T-slot under the drive of the first driving cylinder. By setting up a pushing mechanism, this utility model ensures that the pushing mechanism pushes only one screw to the target position at a time, allowing the screw fastening mechanism to pick up only one screw at a time, reducing the risk of manual intervention to clean misaligned screws, thereby improving the production efficiency of the automatic screw fastening device.

Description

Technical Field

[0001] This utility model relates to the field of screw fastening equipment, and in particular to an automatic screw fastening device. Background Technology

[0002] During product assembly, screws are often used to fasten the product casing or other components together.

[0003] Most mainstream equipment on the market uses a vibratory feeder and linear track for feeding. Although it can arrange the screws in order, due to the lack of precise material distribution control, the screws are prone to being "stacked or side by side" in the track. When the locking mechanism performs the suction action, the screws are often too close together, resulting in the suction of two or more screws at a time. Therefore, the equipment needs to be manually cleaned to remove the misaligned screws, resulting in low production efficiency. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art. This invention provides an automatic screw fastening device. By setting a pushing mechanism, the pushing mechanism pushes only one screw to the target position at a time, so that the screw fastening mechanism of the automatic screw fastening device can only pick up one screw at a time, reducing the risk of manual intervention to clean misaligned screws, thereby reducing equipment downtime for maintenance, which is conducive to improving the uptime of the automatic screw fastening device and thus improving the production efficiency of the automatic screw fastening device.

[0005] Accordingly, this utility model proposes an automatic screw fastening device, which includes: a base, a clamping fixture, and a feeding mechanism;

[0006] The clamping fixture and the feeding mechanism are mounted on the base, with the clamping fixture located on one side of the feeding mechanism and the output end of the feeding mechanism facing the clamping fixture.

[0007] The feeding mechanism includes multiple sets of feeding trays and multiple feeding lines. The input end of any feeding line is connected to any set of feeding trays, and the output end of any feeding line is provided with a pushing mechanism.

[0008] The pushing mechanism includes: a fixed base with a T-slot and a first driving cylinder. A pushing block is provided in the fixed base. The output end of the first driving cylinder is connected to the pushing block. The pushing block moves in the T-slot under the drive of the first driving cylinder.

[0009] Preferably, the T-slot includes a feeding sub-slot and a pushing sub-slot, the feeding sub-slot is connected to the pushing sub-slot, and the corresponding feeding line is engaged in the feeding sub-slot;

[0010] The pusher block is driven by the first drive cylinder to move back and forth in the pusher sub-groove.

[0011] Preferably, a sensor is provided on the fixed base, the detection end of the sensor is located at the intersection of the feed sub-slot and the push sub-slot, and the sensor is signal-connected to the first drive cylinder.

[0012] Preferably, the screw-locking mechanism includes: multiple mounting brackets and multiple screw-locking assemblies, each of the mounting brackets is provided with a first movable guide rail, and each of the screw-locking assemblies is movably mounted on the first movable guide rail;

[0013] Any of the screw-locking components moves back and forth between the feeding mechanism and the clamping fixture along the first moving guide.

[0014] Preferably, any of the screw-locking assemblies includes: a second moving guide rail, a third moving guide rail, a moving base, and a plurality of electric screwdrivers disposed on the moving base;

[0015] The second movable guide rail is movably mounted on the corresponding first movable guide rail, the third movable guide rail is movably mounted on the second movable guide rail, and the movable seat is movably mounted on the third movable guide rail.

[0016] Preferably, the movable base is provided with two symmetrically distributed fourth movable guide rails and a plurality of second drive cylinders, and each of the fourth movable guide rails is provided with a first mounting base and a second mounting base;

[0017] Each of the second driving cylinders is located on one side of a corresponding fourth moving guide rail, and the output end of the second driving cylinder is connected to the first mounting base. The first mounting base is driven by the second driving cylinder to move along the fourth moving guide rail toward the second mounting base or toward the direction away from the second mounting base.

[0018] Preferably, the bottom of the movable base is provided with a plurality of fixing blocks, and the bottom of the second mounting base abuts against the top of the plurality of fixing blocks.

[0019] Preferably, the bottom of the second mounting base is provided with an adsorption screw device, which is connected to an external air source.

[0020] Preferably, any one of the electric screwdrivers is mounted on the corresponding first mounting base, and the screwdriver bit is inserted into the suction screw device;

[0021] The electric screwdriver is driven by the first mounting base to move up and down along the suction screw device.

[0022] Preferably, the bottom of the feeding mechanism is provided with a support frame, which includes a first sub-support frame and a second sub-support frame. The first sub-support frame is located at the bottom of the feeding tray, and the second sub-support frame is located at the feeding line.

[0023] The beneficial effects of this utility model are:

[0024] This invention incorporates a pushing mechanism within the automatic screw fastening equipment. This mechanism pushes only one screw to the target position at a time, ensuring that the corresponding screw fastening mechanism only picks up one screw at a time. This reduces the risk of manual intervention to clean misaligned screws, thereby reducing equipment downtime for maintenance and improving the uptime and production efficiency of the automatic screw fastening equipment. Furthermore, the invention features a T-slot on the fixed base. The T-slot has a "T"-shaped cross-section, with its top opening width slightly larger than the screw head diameter and its bottom width matching the screw shank diameter. When a screw enters the T-slot, its head is held at the top, while the shank slides along the bottom, creating a unique and stable posture that ensures the screws are stably and orderly arranged within the T-slot. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a structural schematic diagram of the automatic screw-locking device in this utility model;

[0027] Figure 2 This is a schematic diagram of the feeding mechanism in this utility model;

[0028] Figure 3 This is a schematic diagram of the material pushing mechanism in this utility model;

[0029] Figure 4 This is a schematic diagram of the structure of the fixing base in this utility model;

[0030] Figure 5 This is a structural schematic diagram of the screw-locking assembly in this utility model.

[0031] In the attached diagram: 1. Base; 2. Clamping fixture; 3. Feeding mechanism; 31. Feeding tray; 32. Feeding line; 33. Pushing mechanism; 331. Fixed seat; 332. T-slot; 3321. Feeding sub-slot; 3322. Pushing sub-slot; 333. First drive cylinder; 334. Pushing block; 335. Sensor; 34. First sub-support frame; 35. Second sub-support frame; 4. Screw locking mechanism; 41. Mounting bracket; 411. First moving guide rail; 42. Screw locking assembly; 421. Second moving guide rail; 422. Third moving guide rail; 423. Moving seat; 4231. Fourth moving guide rail; 4232. Second drive cylinder; 4233. Fixed block; 4234. First mounting seat; 4235. Second mounting seat; 4236. Screw adsorption device; 424. Electric screwdriver. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0033] Figure 1 A schematic diagram of the automatic screw-locking device of this utility model is shown. Figure 2 A schematic diagram of the feeding mechanism in this utility model is shown. Figure 3 A schematic diagram of the material pushing mechanism in this utility model is shown. Figure 4 A schematic diagram of the structure of the fixing base in this utility model is shown. Figure 5The diagram shows the structure of the screw fastening assembly in this utility model. The automatic screw fastening device includes: a base 1, a clamping fixture 2, and a feeding mechanism 3. The clamping fixture 2 and the feeding mechanism 3 are mounted on the base 1, with the clamping fixture 2 located on one side of the feeding mechanism 3, and the output end of the feeding mechanism 3 facing the clamping fixture 2. This shortens the material transfer path, optimizes action coordination, improves system reliability, and facilitates other components of the automatic screw fastening device to transport the material supplied by the feeding mechanism 3 to the corresponding product. The feeding mechanism 3... It includes multiple sets of feeding trays 31 and multiple feeding lines 32. The input end of any feeding line 32 is connected to any set of feeding trays 31, and the output end of any feeding line 32 is provided with a pushing mechanism 33. The pushing mechanism 33 includes: a fixed base 331 with a T-slot 332 and a first driving cylinder 333. A pushing block 334 is provided in the fixed base 331. The output end of the first driving cylinder 333 is connected to the pushing block 334. The pushing block 334 moves in the T-slot 332 under the drive of the first driving cylinder 333. In this embodiment, the feeding mechanism 3 includes two sets of feeding trays 31 and two feeding lines 32. Each set of feeding trays 31 includes two screw vibrating trays, wherein the output ends of the two screw vibrating trays in the same set are opposite each other, and a corresponding feeding line 32 is connected to the output ends of the two screw vibrating trays simultaneously, ensuring that the two screw vibrating trays can alternately output screws to the feeding line 32. Furthermore, the vibration of the two screw vibrating trays is connected to the input end of the feeding line 32, so that when the screw vibrating trays vibrate, they can drive the feeding line 32 to vibrate. In turn, the feeding line 32 can vibrate the screws from the input end of the feeding line 32 to the output end of the feeding line 32, and then move the screws into the fixed base 331 at the output end of the feeding line 32. The fixed base 331 is provided with a T-slot 332. The cross-section of the T-slot 332 is "T" shaped. The top opening width is slightly larger than the diameter of the screw head, and the bottom width matches the diameter of the screw shank. When the screw enters the T-slot 332, the head is stuck at the top of the slot, and the shank slides along the bottom of the slot, forming a unique and stable posture, ensuring that the screws can be stably and orderly arranged in the T-slot 332. The output end of the first drive cylinder 333 is rigidly connected to the push block 334. The cylinder stroke precisely controls the moving distance of the push block 334, ensuring that only one screw is pushed to the target position each time the push block 334 moves. This avoids the screw-locking mechanism 4 of the automatic screw-locking equipment from absorbing multiple screws at once, ensuring that the screw-locking mechanism 4 of the automatic screw-locking equipment absorbs only one screw at a time, reducing the risk of manual intervention to clean misaligned screws, thereby reducing equipment downtime for maintenance, improving the uptime of the automatic screw-locking equipment, and thus improving the production efficiency of the automatic screw-locking equipment.

[0034] Furthermore, the T-slot 332 includes a feed sub-slot 3321 and a pusher sub-slot 3322, the feed sub-slot 3321 and the pusher sub-slot 3322 are connected, and the corresponding feed line 32 is engaged in the feed sub-slot 3321; the pusher block 334 is driven by the first drive cylinder 333 to move back and forth in the pusher sub-slot 3322. In this embodiment, the feed sub-slot 3321 is engaged with the feed line 32 to ensure that the screw on the feed line 32 can smoothly enter the pusher sub-slot 3322 along the feed line 32. The pusher block 334, driven by the first driving cylinder 333, moves back and forth in the feeding sub-slot 3322. When the pusher block 334 is in the initial position, its side is flush with the side wall of the feeding sub-slot 3321, so that the feeding sub-slot 3321 and the feeding sub-slot 3322 form a right-angle path. When the pusher block 334, driven by the first driving cylinder 333, moves from the initial position to a preset position, the pusher block 334 pushes the feeding sub-slot 3321 and the feeding sub-slot 3322. The screws at the intersection of 22 are pushed to a preset position, making it convenient for the corresponding fastening mechanism to pick up the screws. The pusher block 334 moves only one screw to the target position each time, avoiding the automatic screw fastening mechanism 4 from picking up multiple screws at once. This reduces the risk of manual intervention to clean misaligned screws, thereby reducing equipment downtime for maintenance and improving the uptime of the automatic screw fastening equipment, which in turn improves the production efficiency of the automatic screw fastening equipment.

[0035] Furthermore, a sensor 335 is provided on the fixed base 331. The detection end of the sensor 335 is located at the intersection of the feed sub-slot 3321 and the push sub-slot 3322, and the sensor 335 is signal-connected to the first drive cylinder 333. In this embodiment, the sensor 335 is used to detect whether there is material at the intersection of the feed sub-groove 3321 and the push sub-groove 3322. When the sensor 335 detects that there is a screw at the intersection of the feed sub-groove 3321 and the push sub-groove 3322, the sensor 335 generates and sends a corresponding electrical signal to the first drive cylinder 333. After receiving the electrical signal, the first drive cylinder 333 outputs power to push the push block 334 to move along the push sub-groove 3322, thereby pushing the screw located at the intersection to move along the push sub-groove 3322, so that the screw moves to the position set by the program. That is, the automatic screw fastening device uses the sensor 335 to detect the screw position, ensuring that the screw reaches the set point at a constant speed, avoiding interruption or accumulation of material supply, which is conducive to continuous material supply and ensures that the automatic screw fastening device works in a rhythmic manner.

[0036] Furthermore, the screw-locking mechanism 4 includes: a plurality of mounting brackets 41 and a plurality of screw-locking assemblies 42. Each mounting bracket 41 is provided with a first moving guide rail 411, and each screw-locking assembly 42 is movably mounted on the first moving guide rail 411. Each screw-locking assembly 42 moves back and forth between the feeding mechanism 3 and the clamping fixture 2 along the first moving guide rail 411. In this embodiment, the screw-locking mechanism 4 includes two symmetrically distributed mounting brackets 41 and four screw-locking assemblies 42. A working area is formed between the two symmetrically distributed mounting brackets 41. Two of the four screw-locking assemblies 42 are movably mounted on one of the two mounting brackets 41 based on the first moving guide rail 411. That is, two screw-locking assemblies 42 are provided on each mounting bracket 41, and all four screw-locking assemblies 42 are located within the working area formed between the two symmetrically distributed mounting brackets 41. The four screw-locking assemblies 42 move back and forth along the first moving guide rail 411 between the feeding mechanism 3 and the clamping fixture 2, so as to pick up the corresponding screws on the feeding mechanism 3 and then move to the clamping fixture 2 to perform the locking work. The screw-locking assemblies 42 move back and forth along the above path to achieve fully automatic screw picking and locking work.

[0037] Furthermore, any of the screw-locking assemblies 42 includes: a second moving guide rail 421, a third moving guide rail 422, a moving base 423, and a plurality of electric screwdrivers 424 disposed on the moving base 423; the second moving guide rail 421 is movably mounted on the corresponding first moving guide rail 411, the third moving guide rail 422 is movably mounted on the second moving guide rail 421, and the moving base 423 is movably mounted on the third moving guide rail 422. In this embodiment, two electric screwdrivers 424 are provided on the movable base 423. The second movable guide rail 421 is movably mounted on the first movable guide rail 411 to realize the movement of the screw fastening assembly 42 on the X-axis. The third movable guide rail 422 is movably mounted on the second movable guide rail 421 to realize the movement of the screw fastening assembly 42 on the Y-axis. The movable base 423 is movably mounted on the third movable guide rail 422 to realize the movement of the screw fastening assembly 42 on the Z-axis. Through the three-level linkage structure of the second movable guide rail 421, the third movable guide rail 422 and the movable base 423, the two electric screwdrivers 424 can move independently and accurately in the X, Y and Z axes. This allows the electric screwdrivers 424 to be directly positioned to any fastening point in the working area formed between the two symmetrically distributed mounting brackets 41, achieving precise positioning of the electric screwdrivers 424 and ensuring that the electric screwdrivers 424 are aligned with the center of the screw hole, which helps to improve the accuracy and stability of fastening.

[0038] Furthermore, the movable base 423 is provided with two symmetrically distributed fourth movable guide rails 4231 and a plurality of second drive cylinders 4232. Each of the fourth movable guide rails 4231 is provided with a first mounting base 4234 and a second mounting base 4235. Each of the second drive cylinders 4232 is located on one side of the corresponding fourth movable guide rail 4231, and the output end of the second drive cylinder 4232 is connected to the first mounting base 4234. The first mounting base 4234 is driven by the second drive cylinder 4232 to move along the fourth movable guide rail 4231 toward the second mounting base 4235 or toward a direction away from the second mounting base 4235. In this embodiment, the movable seat 423 is equipped with two second drive cylinders 4232. One of the second drive cylinders 4232 is located on one side of the corresponding fourth moving guide rail 4231. The second drive cylinder 4232 can drive the corresponding first mounting seat 4234 to move along the fourth moving guide rail 4231 towards or away from the second mounting seat 4235. In assembly operations, this design can realize synchronous operation of two workstations. Moreover, the synchronous movement of the two first mounting seats 4234 ensures the consistency and coordination of assembly actions, which helps to improve the assembly quality of the product and reduce assembly errors and defect rates that may be caused by asynchronous operations. The two second drive cylinders 4232 can also realize sequential operation of the two workstations, which is beneficial to ensuring that various different production needs are met.

[0039] Furthermore, the bottom of the movable base 423 is provided with a plurality of fixing blocks 4233, and the bottom of the second mounting base 4235 abuts against the tops of the plurality of fixing blocks 4233. In this embodiment, the bottom of the movable base 423 is provided with four fixing blocks 4233, wherein two of the four fixing blocks 4233 are correspondingly distributed on the bottom of one of the second mounting bases 4235. The two fixing blocks 4233 are symmetrically distributed based on the center of the second mounting base 4235, and the tops of the two fixing blocks 4233 abut against the second mounting base 4235, providing sufficient support from two positions and reducing the risk of the second mounting base 4235 falling off the fourth guide rail; and a locking space is left between the two fixing blocks 4233, allowing the bit of the electric screwdriver 424 to pass through the locking space, ensuring locking depth and angle accuracy, which is beneficial to improving the locking accuracy of the automatic screw fastening device.

[0040] Furthermore, a screw-adsorption device 4236 is provided at the bottom of the second mounting base 4235, and the screw-adsorption device 4236 is connected to an external air source. In this embodiment, the screw-adsorption device 4236 is used to adsorb the screws output by the feeding mechanism 3. The screw-adsorption device 4236 has a vacuum suction cup. When the screw-adsorption device 4236 moves above the corresponding screw and the suction port of the screw-adsorption device 4236 is aligned with the corresponding screw, the external air source draws air from inside the screw-adsorption device 4236, so that the screw can be stably adsorbed by the screw-adsorption device 4236 in its suction port, avoiding problems such as screws easily falling off and inaccurate adsorption, which helps to reduce equipment failures and defective products caused by poor adsorption.

[0041] Furthermore, each of the electric screwdrivers 424 is mounted on the corresponding first mounting base 4234, and the bit of the electric screwdriver 424 is inserted into the screw-attracting device 4236. The electric screwdriver 424 is driven by the first mounting base 4234 to move up and down along the screw-attracting device 4236. When the electric screwdriver 424 moves downward along the screw-attracting device 4236 driven by the first mounting base 4234, the bit of the electric screwdriver 424 contacts the corresponding screw and screws the screw into the corresponding screw hole. When the electric screwdriver 424 moves upward along the screw-attracting device 4236 driven by the first mounting base 4234, the bit of the electric screwdriver 424 disengages from the corresponding screw, and the bit of the electric screwdriver 424 moves to the highest point, leaving space for the screw-attracting device 4236 to attract the next screw. In this embodiment, the bit of the electric screwdriver 424 is inserted into the screw adsorption device 4236, so that the bit of the electric screwdriver 424 can be aligned with the screw adsorbed by the screw adsorption device 4236. During the screw tightening process, the screw can be screwed into the screw hole at the correct angle and position, avoiding problems such as screw tilting or offset caused by misalignment between the bit and the screw, thereby ensuring the assembly accuracy between various components.

[0042] Furthermore, a support frame is provided at the bottom of the feeding mechanism 3. The support frame includes a first sub-support frame 34 and a second sub-support frame 35. The first sub-support frame 34 is located at the bottom of the feeding tray 31, and the second sub-support frame 35 is located at the feeding line 32. In this embodiment, the first sub-support frame 34 is used to raise the feeding tray 31 to a corresponding height, that is, the first sub-support frame 34 raises the feeding tray 31 to the same height as the product that needs to be tightened with screws. The second sub-support frame 35 is used to raise the feeding tray to the same height as the output end of the feeding tray 31. The first sub-support frame 34 and the second sub-support frame 35 raise the feeding tray 31 and the feeding line 32 to a certain height, which can reduce the travel of the moving seat 423 and facilitate the suction screw device 4236 to suction the screw pushed out by the feeding line 32. Furthermore, the support bracket raises the feeding line 32 and the feeding tray 31 to the same height as the product that needs to be tightened with screws, which can reduce the number of programming steps and reduce the debugging complexity of the entire automatic screw tightening equipment.

[0043] In summary, this invention, by incorporating a pushing mechanism within the automatic screw fastening equipment, ensures that only one screw is pushed to the target position at a time. This allows the corresponding screw fastening mechanism to pick up only one screw at a time, reducing the risk of manual intervention to clean misaligned screws, thereby minimizing equipment downtime for maintenance and improving the equipment's uptime and production efficiency. Furthermore, this invention features a T-slot on the fixed base. The T-slot has a "T"-shaped cross-section, with its top opening width slightly larger than the screw head diameter and its bottom width matching the screw shank diameter. When a screw enters the T-slot, its head is secured at the top, while the shank slides along the bottom, creating a unique and stable posture that ensures the screws are stably and orderly arranged within the T-slot.

[0044] Furthermore, the above provides a detailed description of the automatic screw-locking device provided by the embodiments of this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An automatic screw fastening device, characterized in that, The automatic screw fastening device includes: a base, a clamping fixture, and a feeding mechanism; The clamping fixture and the feeding mechanism are mounted on the base, with the clamping fixture located on one side of the feeding mechanism and the output end of the feeding mechanism facing the clamping fixture. The feeding mechanism includes multiple sets of feeding trays and multiple feeding lines. The input end of any feeding line is connected to any set of feeding trays, and the output end of any feeding line is provided with a pushing mechanism. The pushing mechanism includes: a fixed base with a T-slot and a first driving cylinder. A pushing block is provided in the fixed base. The output end of the first driving cylinder is connected to the pushing block. The pushing block moves in the T-slot under the drive of the first driving cylinder.

2. The automatic screw fastening device according to claim 1, characterized in that, The T-shaped groove includes a feeding sub-groove and a pushing sub-groove, the feeding sub-groove and the pushing sub-groove are connected, and the corresponding feeding line is snapped into the feeding sub-groove; The pusher block is driven by the first drive cylinder to move back and forth in the pusher sub-groove.

3. The automatic screw fastening device according to claim 2, characterized in that, A sensor is installed on the fixed base. The detection end of the sensor is located at the intersection of the feed sub-slot and the push sub-slot, and the sensor is connected to the first drive cylinder via signal.

4. The automatic screw fastening device according to claim 1, characterized in that, The automatic screw fastening device further includes a screw fastening mechanism, which includes: multiple mounting brackets and multiple screw fastening components. Each mounting bracket is provided with a first movable guide rail, and each screw fastening component is movably mounted on the first movable guide rail. Any of the screw-locking components moves back and forth between the feeding mechanism and the clamping fixture along the first moving guide.

5. The automatic screw fastening device according to claim 4, characterized in that, Any of the screw-locking assemblies includes: a second moving guide rail, a third moving guide rail, a moving base, and a plurality of electric screwdrivers disposed on the moving base; The second movable guide rail is movably mounted on the corresponding first movable guide rail, the third movable guide rail is movably mounted on the second movable guide rail, and the movable seat is movably mounted on the third movable guide rail.

6. The automatic screw fastening device according to claim 5, characterized in that, The movable base is provided with two symmetrically distributed fourth movable guide rails and multiple second drive cylinders, and each of the fourth movable guide rails is provided with a first mounting base and a second mounting base. Each of the second driving cylinders is located on one side of a corresponding fourth moving guide rail, and the output end of the second driving cylinder is connected to the first mounting base. The first mounting base is driven by the second driving cylinder to move along the fourth moving guide rail toward the second mounting base or toward the direction away from the second mounting base.

7. The automatic screw fastening device according to claim 6, characterized in that, The bottom of the movable base is provided with multiple fixing blocks, and the bottom of the second mounting base abuts against the top of the multiple fixing blocks.

8. The automatic screw fastening device according to claim 6, characterized in that, The bottom of the second mounting base is provided with an adsorption screw device, which is connected to an external air source.

9. The automatic screw fastening device according to claim 8, characterized in that, Each of the electric screwdrivers is mounted on the corresponding first mounting base, and the screwdriver bit is inserted into the magnetic screw device; The electric screwdriver is driven by the first mounting base to move up and down along the suction screw device.

10. The automatic screw fastening device according to claim 1, characterized in that, The bottom of the feeding mechanism is provided with a support frame, which includes a first sub-support frame and a second sub-support frame. The first sub-support frame is located at the bottom of the feeding tray, and the second sub-support frame is located at the feeding line.

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