Screw tightening equipment

Abstract

The utility model relates to the technical field of screw mounting equipment, in particular to screw tightening equipment which comprises a machine body, a conveying device is mounted on the machine body, a rack is mounted on the machine body, a tightening assembly for tightening screws is mounted on the rack, a feeding assembly for feeding the screws is mounted on the rack, and the feeding assembly comprises a storage box. The storage box is installed on the machine frame, a lifting assembly for taking screws is arranged on the storage box, a discharging port is formed in the storage box, a conveying assembly for conveying the screws out of the discharging port is installed on the storage box, and an adjusting device for adjusting the feeding distance is installed on the storage box. The adjusting device is provided with a tray used for receiving the screws conveyed out by the conveying assembly. The screw tightening equipment has the effect that the convenience of the screw tightening equipment in the operation process is improved.

Description

Technical Field

[0001] The present application relates to the technical field of screw installation equipment, and in particular to a screw tightening equipment. Background Art

[0002] Circuit boards are an indispensable component in electronic devices in today's technological era. The emergence of circuit boards has made many functions of electronic products and circuit integration possible. Circuit boards are also called circuit boards, PCB boards and PCBs.

[0003] After the circuit board is manufactured, it is usually installed on a base for loading the circuit board by fixing it with screws and nuts. Among the most existing screw tightening equipment, most of them adopt an assembly line working method, and the screws are sucked or clamped by an automatic tightening gun and then tightened on the circuit board. In order to ensure the smooth flow of the working line, the equipment for providing screws is usually set next to the working line. However, when the screws are sucked from outside the working line by the tightening gun during the tightening action, the movement distance is large, resulting in a large swing amplitude of the tightening gun, which is inconvenient for the tightening gun to suck the screws, slowing down the processing speed. Utility Model Content

[0004] In order to improve the convenience of a screw tightening device during operation, the present application provides a screw tightening device.

[0005] The present application provides a screw tightening device, which adopts the following technical solution:

[0006] A screw tightening device comprises a body, a transport device is installed on the body, a frame is installed on the body, a tightening assembly for tightening screws is installed on the frame, a feeding assembly for providing screws is installed on the frame, the feeding assembly comprises a storage box, the storage box is installed on the frame, a lifting assembly for taking screws is provided on the storage box, a discharge port is opened on the storage box, a conveying assembly for delivering screws from the discharge port is installed on the storage box, an adjusting device for adjusting the feeding distance is installed on the storage box, and a tray for receiving the screws delivered by the conveying assembly is installed on the adjusting device.

[0007] By adopting the above technical scheme, the transport device quickly transports the base and the PCB board to the tightening position, the lifting assembly transports the screws to the transport assembly, and the transport assembly transports the screws out of the discharge port. The tray is controlled by the adjustment device to approach the feeding assembly and transfer the screws to the tray, and then the tray is moved to the top of the transport device by the adjustment device, so that the tray is close to the tooling plate, which is convenient for quick access to the screws. The tightening assembly is controlled to tighten the screws onto the PCB board, which is conducive to improving the convenience of the screw tightening device during operation.

[0008] In a specific possible implementation scheme, the adjustment device includes a slide cylinder, which is installed on the storage box, a first slide bar is slidably installed on the slide cylinder, a second slide bar is slidably installed on the first slide bar, a loading plate is installed on the second slide bar, and the tray is installed on the loading plate.

[0009] By adopting the above technical solution, the pallet is dragged and slid out of the slide tube using the first slide bar and the second slide bar, so that the pallet is close to the tooling plate in the horizontal direction, and the pallet is adjusted to a position close to the tooling plate, thereby facilitating the tightening assembly to grasp and use the screws, thereby improving processing efficiency.

[0010] In a specific feasible implementation scheme, a first cylinder is mounted on the frame, a first connecting plate is mounted on the output shaft of the first cylinder, a second connecting plate is mounted on the first connecting plate, a storage box is mounted on the second connecting plate, a discharge port is provided on the storage box, a lifting assembly for conveying screws is mounted on the storage box, and a conveying assembly for receiving the delivery screws of the lifting assembly is mounted on the storage box.

[0011] By adopting the above technical solution, the screws are stored in the storage box, and the screws are added to the storage box regularly, which facilitates the collection and use of the screws. The position of the storage box is controlled by the first cylinder, which facilitates the addition of screws.

[0012] In a specific feasible implementation scheme, the lifting assembly includes a screw rod, which is rotatably mounted on the storage box, a second motor is mounted on the storage box, an output shaft of the second motor is connected to the screw rod, a fourth slider is threadedly connected to the screw rod, a guide rod is mounted on the storage box, the fourth slider is slidably connected to the guide rod, a third cylinder is mounted on the fourth slider, and a suction cup is mounted on the output shaft of the third cylinder.

[0013] By adopting the above technical solution, the second motor controls the rotation of the screw rod, driving the fourth slider to slide on the screw rod to make the suction cup approach and move away from the conveying component. The third cylinder adjusts the height of the suction cup so that the suction cup absorbs the storage box containing screws to ensure the supply of screws.

[0014] In a specific possible implementation scheme, the transport component includes a third rotating rod, the third rotating rod is rotatably mounted on the storage box, a third motor is mounted on the storage box, the output shaft of the third motor is connected to the third rotating rod, a first rotating drum is mounted on the third rotating rod, a track is mounted on the first rotating drum, a fourth rotating rod is rotatably mounted on the storage box, a second rotating drum is mounted on the fourth rotating rod, and the track is mounted on the second rotating drum at one end away from the first rotating drum.

[0015] By adopting the above solution, after the lifting assembly places the storage box on the crawler belt, the third motor controls the third rotating rod to rotate, thereby driving the crawler belt to rotate, so that the storage box can be quickly and smoothly transported to the pallet.

[0016] In a specific feasible implementation scheme, the transport device includes a first transport frame, the first transport frame is mounted on the machine body, a first conveyor belt is arranged on the first transport frame, a second transport frame is mounted on the machine body, a second conveyor belt is arranged on the second transport frame, tooling plates are placed on the first conveyor belt and the second conveyor belt, a transmission rod for controlling the movement of the first conveyor belt is mounted on the first transport frame, the transmission rod is connected to the second transport frame at one end away from the first transport frame, a first motor is mounted on the first transport frame, and the output shaft of the first motor is connected to the transmission rod.

[0017] By adopting the above technical solution, the PCB board and the base are placed on the tooling board, and the tooling board can be quickly and smoothly transported to the tightening position through the first conveyor belt and the second conveyor belt.

[0018] In a specific feasible implementation scheme, a positioning device for positioning the tooling plate is installed on the machine body, and the positioning device includes a third connecting plate, the third connecting plate is installed on the machine body, a guide cylinder is installed on the third connecting plate, a fourth connecting plate is installed on the guide cylinder, a first support block and a second support block are installed on the fourth connecting plate, a first rotating shaft is installed on the first support block, an end of the first rotating shaft away from the first support block is connected to the second support block, a blocking block is installed on the first rotating shaft, a second rotating shaft is rotatably installed on the blocking block, a roller is installed on the second rotating shaft, a torsion spring is sleeved on the first rotating shaft, one end of the torsion spring abuts against the blocking block, and the other end abuts against the fourth connecting plate, a second cylinder is installed on the third connecting plate, and the output shaft of the second cylinder passes through the third connecting plate and the guide cylinder and abuts against the blocking block.

[0019] By adopting the above technical solution, the torsion spring and the second cylinder work together to control the rotation of the blocking block. When one end of the roller installed on the blocking block rises, the roller blocks the tooling plate, quickly positions the tooling plate, and prevents the tooling plate from continuing to move forward during the screwing process. When the screw is tightened, the second cylinder and the torsion spring control the roller to lower, so that the tooling plate continues to flow.

[0020] In a specific feasible implementation scheme, the tightening assembly includes a first slide rail, which is slidably mounted on the frame, a first slider is slidably mounted on the first slide rail, a third slide rail and a fourth slide rail are mounted on the first slider, a second slide rail is mounted on the frame, a second slider is slidably mounted on the second slide rail, the third slide rail and the fourth slide rail are simultaneously connected to the second slider, a third slider is slidably mounted on the third slide rail, the third slider is simultaneously slidably mounted on the fourth slide rail, a connecting rod is mounted on the third slider, a hanging ring is mounted on the connecting rod, and a tightening gun is mounted on the hanging ring.

[0021] By adopting the above technical solution, when the tightening gun is used, the tightening gun is taken down from the hanging ring, and when the tightening gun is not in use, the tightening gun is hung on the hanging ring. Through the action of the first slide rail, the second slide rail and the third slide rail, the tightening gun is pushed away from the top of the transport device, which is convenient for the circulation of the tooling plate and also convenient for grabbing and placing the tightening gun.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. The transport device quickly transports the base and PCB board to the tightening position, the lifting assembly transports the screws to the transport assembly, and the transport assembly transports the screws out of the discharge port. The tray is manipulated to approach the feeding assembly through the adjustment device and the screws are transferred to the tray. The tray is then moved to the top of the transport device through the adjustment device, so that the tray is close to the tooling board to facilitate quick access to the screws. The tightening assembly is manipulated to tighten the screws onto the PCB board, which is conducive to improving the convenience of the screw tightening device during operation.

[0024] 2. Through the setting of the adjustment device, the pallet is dragged and slid out of the slide cylinder using the first slide bar and the second slide bar, so that the pallet is close to the tooling plate in the horizontal direction, and the pallet is adjusted to a position close to the tooling plate, thereby facilitating the tightening assembly to grasp and use the screws and improving the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of a screw tightening device according to an embodiment of the present application.

[0026] Figure 2 It is a schematic diagram of a positioning device according to an embodiment of the present application.

[0027] Figure 3 It is a schematic diagram of the installation position relationship of the torsion spring of the positioning device of the embodiment of the present application.

[0028] Figure 4 It is a schematic diagram of a tightening assembly according to an embodiment of the present application.

[0029] Figure 5It is a schematic diagram of the overall structure of the feeding assembly of an embodiment of the present application.

[0030] Figure 6 It is a schematic diagram of a storage box of an embodiment of the present application with one side wall removed.

[0031] Figure 7 It is a cross-sectional view of the slide cylinder of the adjustment device of the embodiment of the present application.

[0032] Figure 8 It is a schematic diagram of the regulating device of an embodiment of the present application.

[0033] 1. Machine body; 12. Frame; 2. Transport device; 21. First transport frame; 22. First conveyor belt; 23. Second transport frame; 24. Second conveyor belt; 25. Transmission rod; 26. First motor; 27. Fixing plate; 3. Positioning device; 31. Third connecting plate; 32. Guide cylinder; 33. Fourth connecting plate; 331. First support block; 332. Second support block; 333. First rotating shaft; 34. Stop block; 341. Second rotating shaft; 342. Roller; 343. Torsion spring; 35. Second cylinder; 4. Tightening assembly; 411. First slide rail; 412. First slider; 421. Second slide rail; 422. Second slider; 43. Third slide rail; 44. Fourth slide rail; 45. Third slider; 46. Connecting rod; 47. Hanging ring; 48. Tightening assembly Tightening gun; 5, feeding assembly; 511, first cylinder; 512, first connecting plate; 513, second connecting plate; 52, storage box; 53, lifting assembly; 531, screw rod; 532, guide rod; 533, second motor; 534, fourth slider; 535, third cylinder; 536, suction cup; 54, conveying assembly; 541, third rotating rod; 542, first rotating drum; 543, fourth rotating rod; 544, second rotating drum; 545, third motor; 546, crawler; 55, discharge port; 56, adjusting device; 561, slide; 5611, first slide bar; 5612, first limit block; 5613, first positioning block; 5614, second slide bar; 5615, second limit block; 5616, second positioning block; 562, loading plate; 564, tray. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-8 This application is described in further detail.

[0035] Example:

[0036] The present application embodiment discloses a screw tightening device, referring to Figure 1, including a body 1, a transport device 2 for transporting PCB boards is installed on the body 1, a tooling plate 27 is provided on the transport device 2, a base with PCB boards is provided on the tooling plate 27, a positioning device 3 for positioning the PCB boards is installed on the body 1, a frame 12 is fixedly installed on the body 1, a tightening assembly 4 is installed on the frame 12, the tightening assembly 4 is arranged above the transport device 2, and a feeding assembly 5 for providing screws to the tightening assembly 4 is installed on the body 1.

[0037] After placing the assembly of the base and the PCB board on the tooling plate 27, the transport device 2 quickly transports the tooling plate 27 to the screw tightening position, and the positioning device 3 positions the tooling plate 27 so that the tooling plate 27 stays at the screw tightening position. The feeding component 5 provides screws to the tightening component 4, and the screws are tightened onto the PCB board through the tightening component 4, which is conducive to improving the convenience of the screw tightening equipment during operation.

[0038] The transport device 2 includes a first transport frame 21 and a second transport frame 23, both of which are fixedly mounted on the machine body 1, and are arranged in parallel. In this embodiment, both the first transport frame 21 and the second transport frame 23 are provided with rotating wheels, and the first transport frame 21 is provided with a first conveyor belt 22, which is rotatably mounted on the first transport frame 21 through the rotating wheel in the first transport frame 21. The second transport frame 23 is provided with a second conveyor belt 24, which is rotatably mounted on the second transport frame 23 through the rotating wheel in the second transport frame 23. A transmission rod 25 is fixedly mounted on the rotating wheel of the first transport frame 21, and the end of the transmission rod 25 away from the first transport frame 21 is fixedly connected to the rotating wheel of the second transport frame 23, and a first motor 26 for controlling the rotation of the transmission rod 25 is fixedly mounted on the first transport frame 21, and a tooling plate 27 is placed on the first conveyor belt 22 and the second conveyor belt 24, and an assembly of a base and a PCB board is placed on the tooling plate 27.

[0039] The assembly of the base and the PCB board is placed on the tooling board 27, and the first conveyor belt 22 is controlled to rotate by the first motor 26. The transmission rod 25 drives the second conveyor belt 24 to rotate synchronously with the first conveyor belt 22. The first conveyor belt 22 and the second conveyor belt 24 jointly support and transport the tooling board 27, thereby improving the stability of the tooling board 27 during transportation.

[0040] Reference Figure 2 and Figure 3The positioning device 3 includes a third connecting plate 31, which is fixedly mounted on the machine body 1 and arranged between the first transport frame 21 and the second transport frame 23. A guide cylinder 32 is fixedly mounted on the third connecting plate 31, and the guide cylinder 32 is vertically arranged. A fourth connecting plate 33 is fixedly mounted on the guide cylinder 32. A first supporting block 331 and a second supporting block 332 are fixedly mounted on the fourth connecting plate 33. A first rotating shaft 333 is rotatably mounted on the first supporting block 331, and the first rotating shaft 333 is away from One end of the first support block 331 is rotatably connected to the second support block 332, and a blocking block 34 is fixedly mounted on the first rotating shaft 333. The blocking block 34 is arranged between the first support block 331 and the second support block 332. In this embodiment, the blocking block 34 is a triangular block, and one corner of the triangular block is fixedly connected to the first rotating shaft 333. The second cylinder 35 is fixedly mounted on the third connecting plate 31, and the output shaft of the second cylinder 35 passes through the third connecting plate 31 and the guide cylinder 32 in sequence and finally abuts against one side wall of the blocking block 34. The second rotating shaft 341 is rotatably mounted on the blocking block 34, and the second rotating shaft 341 is arranged at a corner away from the second cylinder 35 and the first rotating shaft 333. A roller 342 is fixedly mounted on the second rotating shaft 341, and a torsion spring 343 is sleeved on the second rotating shaft 341, and one end of the torsion spring 343 abuts against the fourth connecting plate 33, and the other end of the torsion spring 343 abuts against the blocking block 34.

[0041] When the positioning device 3 positions the tooling plate 27, the second cylinder 35 controls the output shaft to retract, the torsion spring 343 pushes the blocking block 34 to rotate around the first rotating shaft 333 through elastic force, and the roller 342 rises and blocks the side wall of the tooling plate 27, preventing the tooling plate 27 from continuing to move, thereby achieving rapid positioning and stopping of the tooling plate 27. When the screws are tightened, the second cylinder 35 controls the output shaft to extend and abut against the blocking block 34, so that the blocking block 34 also rotates around the first rotating shaft 333, and the roller 342 moves downward to release the tooling plate 27, allowing the tooling plate 27 to continue to move, so that the movement of the tooling plate 27 can be controlled, which is convenient for tightening the screws on the PCB and fixing the PCB on the base.

[0042] Reference Figure 4The tightening assembly 4 includes a first slide rail 411 and a second slide rail 421. The first slide rail 411 and the second slide rail 421 are both fixedly mounted on the frame 12. The first slide rail 411 and the second slide rail 421 are arranged in parallel. The first slider 412 is slidably mounted on the first slide rail 411, and the second slider 422 is slidably mounted on the second slide rail 421. The third slide rail 43 and the fourth slide rail 44 are simultaneously fixedly mounted on the first slider 412 and the second slider 422. The third slide rail 43 and the fourth slide rail 44 are arranged in parallel. The third slider 45 is simultaneously slidably mounted on the third slide rail 43 and the fourth slide rail 44. A connecting rod 46 is fixedly mounted on the third slider 45, and a hanging ring 47 is fixedly mounted on the connecting rod 46. A tightening gun 48 is hung on the hanging ring 47. In this embodiment, the tightening gun 48 is an adsorption-type handheld tightening gun. The adsorption-type handheld tightening gun is a prior art and will not be described in detail in the present embodiment of the application.

[0043] When it is necessary to install screws on the PCB board, the tightening gun 48 is removed from the hanging ring 47, and the tightening gun 48 is controlled to suck the screws from the tray 564 and install and tighten them on the PCB board. When the screw installation and tightening of the assembly of the PCB board on a tooling board 27 is completed, the tightening gun 48 is placed on the hanging ring 47, and the tightening gun 48 is dragged to make the third slider 45 slide on the third slide rail 43 and the fourth slide rail 44, and the third slide rail 43 and the fourth slide rail 44 slide on the first slide rail 411 and the second slide rail 421, so that the tightening gun 48 is kept away from the tooling board 27, which is convenient for moving the tooling board 27 and convenient for taking and using the tightening gun 48 next time.

[0044] Reference Figure 5 and Figure 6 The feeding assembly 5 includes a first cylinder 511, the output direction of the first cylinder 511 is set toward the direction of the transportation device 2, the first cylinder 511 is fixedly installed on the frame 12, the output shaft of the first cylinder 511 is fixedly installed with a first connecting plate 512, the first connecting plate 512 is fixedly installed with a second connecting plate 513, the second connecting plate 513 is horizontally arranged, a storage box 52 is fixedly installed on the second connecting plate 513, the storage box 52 is provided with a lifting assembly 53 for grabbing screws and a conveying assembly 54 for conveying screws, a discharge port 55 is opened on the storage box 52, and the conveying assembly 54 is arranged below the discharge port 55.

[0045] The lifting assembly 53 includes a screw rod 531, which is rotatably mounted on the storage box 52. A second motor 533 is fixedly mounted on the storage box 52. The output shaft of the second motor 533 is fixedly connected to the screw rod 531. A fourth slider 534 is threadedly connected to the screw rod 531. A guide rod 532 is fixedly mounted on the storage box 52. The guide rod 532 is arranged parallel to the screw rod 531. The fourth slider 534 is also slidably connected to the guide rod 532. A third cylinder 535 is fixedly mounted on the fourth slider 534. The output shaft direction of the third cylinder 535 is arranged downward. A suction cup 536 is fixedly mounted on the output shaft of the third cylinder 535. In this embodiment, the suction cup 536 is a vacuum suction cup, and a vacuum generator is connected to the suction cup 536.

[0046] The transport assembly 54 includes a third rotating rod 541, which is rotatably mounted on the storage box 52, and is disposed near the lifting assembly 53. A first rotating drum 542 is fixedly mounted on the third rotating rod 541, and a third motor 545 is fixedly mounted on the storage box 52. The output shaft of the third motor 545 is fixedly connected to the third rotating rod 541. A fourth rotating rod 543 is rotatably mounted on the storage box 52, and is disposed parallel to the third rotating rod 541. The fourth rotating rod 543 is disposed away from the lifting assembly 53, and a second rotating drum 544 is fixedly mounted on the fourth rotating rod 543. A crawler 546 is mounted on the second rotating drum 544, and one end of the crawler 546 away from the second rotating drum 544 is mounted on the first rotating drum 542, and the crawler 546 and the discharge plane of the discharge port 55 are on the same horizontal plane.

[0047] The storage boxes with screws are stacked in the storage box 52. When the screws are needed, the third cylinder 535 controls the suction cup 536 to move downward. After the suction cup 536 sucks the storage box tightly, the third cylinder 535 controls the suction cup 536 to drive the storage box to move upward. The second motor 533 controls the screw rod 531 to rotate. The fourth slider 534 moves along the direction of the guide rod 532 under the action of the guide rod 532, thereby driving the storage box to move toward the conveying component 54. When the storage box moves to above the crawler 546, the third cylinder 535 controls the suction cup 536 to move downward. The suction cup 536 unloads the force to place the storage box on the crawler 546. The third motor 545 starts to control the third rotating rod 541 to rotate and drive the crawler 546 to rotate, thereby transporting the storage box out of the storage box 52.

[0048] Reference Figure 6 and Figure 7An adjusting device 56 is installed on the storage box 52, and the adjusting device 56 includes a slide 561, which is fixedly installed on the storage box 52, and the slide 561 is arranged below the fourth rotating rod 543. The slide 561 is arranged horizontally, and a first slide bar 5611 is slidably installed in the slide 561. The diameter of the first slide bar 5611 is smaller than the diameter of the slide 561. A first limit block 5612 is arranged near one end of the slide 561 of the first slide bar 561, and a first positioning block 5613 is arranged near one end of the slide 561 of the slide 561. When the first slide bar 5611 is fully extended, the first limit block 5612 and the first positioning block 5613 abut against each other. The second slide bar 5614 is slidably installed in the first slide bar 5611. The diameter of the second slide bar 5614 is smaller than that of the first slide bar 5611. A second limit block 5615 is provided at one end of the second slide bar 5614 close to the slide cylinder 561. A second positioning block 5616 is provided at one end of the first slide bar 5611 away from the slide cylinder 561. When the second slide bar 5614 is fully extended, the second limit block 5615 abuts against the second positioning block 5616.

[0049] Reference Figure 6 and Figure 8 A loading plate 562 is fixedly mounted on one end of the second slide bar 5614 away from the slide cylinder 561. In this embodiment, two slide cylinders 561 are provided. The loading plate 562 is fixedly mounted on the second slide bars 5614 of the two slide cylinders 561 at the same time. When the first slide bar 5611 and the second slide bar 5614 are fully extended, the loading plate 562 can be located directly above the transport device 2. A tray 564 is fixedly mounted on the loading plate 562. The tray 564 is horizontally arranged and the tray 564 and the crawler 546 are on the same horizontal plane.

[0050] Push the tray 564 to retract the first slide bar 5611 and the second slide bar 5614 into the slide tube 561, so that the tray 564 abuts against the storage box 52 and receives the storage box containing screws. After receiving the storage box, pull the tray 564 to move above the transportation device 2 to shorten the distance between the screws and the tightening gun 48, making it easier to suck the screws when using the tightening gun 48, shortening the distance for sucking the screws, and helping to improve the convenience of the screw tightening equipment during operation.

[0051] The implementation principle of the embodiment of the present application is as follows: after placing the assembly of the base and the PCB board on the tooling plate 27, the first motor 26 controls the first conveyor belt 22 and the second conveyor belt 24 to quickly transport the tooling plate 27 to the screw tightening position, and the positioning device 3 realizes the positioning of the tooling plate 27. The roller 342 is controlled by the second cylinder 35 to block the tooling plate 27, so that the tooling plate 27 stays in the screw tightening position for easy processing. The feeding component 5 transports the screws to the tray 564, and pulls the tray 564 horizontally through the slide 561 to approach the transportation device 2, thereby shortening the distance between the tray 564 and the transportation device 2, so as to facilitate the tightening gun 48 to quickly exchange screws, speed up the processing efficiency, and help improve the convenience of the screw tightening equipment during operation.

[0052] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A screw tightening device, characterized in that: The invention comprises a machine body (1), a transport device (2) being mounted on the machine body (1), a frame (12) being mounted on the machine body (1), a tightening assembly (4) for tightening screws being mounted on the frame (12), a feeding assembly (5) for providing screws being mounted on the frame (12), the feeding assembly (5) comprising a storage box (52), the storage box (52) being mounted on the frame (12), a lifting assembly (53) for taking screws being arranged on the storage box (52), a discharge port (55) being opened on the storage box (52), a conveying assembly (54) for delivering screws from the discharge port (55) being mounted on the storage box (52), an adjusting device (56) for adjusting the feeding distance being mounted on the storage box (52), and a tray (564) for receiving screws delivered by the conveying assembly (54) being mounted on the adjusting device (56).

2. A screw tightening device according to claim 1, characterized in that: The adjusting device (56) comprises a slide cylinder (561), wherein the slide cylinder (561) is mounted on the storage box (52), a first slide bar (5611) is slidably mounted on the slide cylinder (561), a second slide bar (5614) is slidably mounted on the first slide bar (5611), a loading plate (562) is mounted on the second slide bar (5614), and the tray (564) is mounted on the loading plate (562).

3. The screw tightening device according to claim 1, characterized in that: A first cylinder (511) is mounted on the frame (12); a first connecting plate (512) is mounted on the output shaft of the first cylinder (511); a second connecting plate (513) is mounted on the first connecting plate (512); and the storage box (52) is mounted on the second connecting plate (513).

4. The screw tightening device according to claim 1, characterized in that: The lifting assembly (53) comprises a screw rod (531), the screw rod (531) is rotatably mounted on the storage box (52), a second motor (533) is mounted on the storage box (52), an output shaft of the second motor (533) is connected to the screw rod (531), a fourth slider (534) is threadedly connected to the screw rod (531), a guide rod (532) is mounted on the storage box (52), the fourth slider (534) is slidably connected to the guide rod (532), a third cylinder (535) is mounted on the fourth slider (534), and a suction cup (536) is mounted on the output shaft of the third cylinder (535).

5. The screw tightening device according to claim 1, characterized in that: The transport assembly (54) comprises a third rotating rod (541), the third rotating rod (541) is rotatably mounted on the storage box (52), a third motor (545) is mounted on the storage box (52), an output shaft of the third motor (545) is connected to the third rotating rod (541), a first rotating drum (542) is mounted on the third rotating rod (541), a crawler belt (546) is mounted on the first rotating drum (542), a fourth rotating rod (543) is rotatably mounted on the storage box (52), a second rotating drum (544) is mounted on the fourth rotating rod (543), and an end of the crawler belt (546) away from the first rotating drum (542) is mounted on the second rotating drum (544).

6. The screw tightening device according to claim 1, characterized in that: The transport device (2) comprises a first transport frame (21), the first transport frame (21) being mounted on the machine body (1), a first conveyor belt (22) being arranged on the first transport frame (21), a second transport frame (23) being mounted on the machine body (1), a second conveyor belt (24) being arranged on the second transport frame (23), a tooling plate (27) being placed on the first conveyor belt (22) and the second conveyor belt (24), a transmission rod (25) being mounted on the first transport frame (21) for controlling the movement of the first conveyor belt (22), an end of the transmission rod (25) being away from the first transport frame (21) being connected to the second transport frame (23), a first motor (26) being mounted on the first transport frame (21), an output shaft of the first motor (26) being connected to the transmission rod (25).

7. A screw tightening device according to claim 6, characterized in that: The machine body (1) is provided with a positioning device (3) for positioning the tooling plate (27), the positioning device (3) comprising a third connecting plate (31), the third connecting plate (31) being mounted on the machine body (1), a guide cylinder (32) being mounted on the third connecting plate (31), a fourth connecting plate (33) being mounted on the guide cylinder (32), a first supporting block (331) and a second supporting block (332) being mounted on the fourth connecting plate (33), a first rotating shaft (333) being mounted on the first supporting block (331), an end of the first rotating shaft (333) away from the first supporting block (331) being connected to the second supporting block The first rotating shaft (333) is connected to the fourth connecting plate (332), a blocking block (34) is installed on the first rotating shaft (333), a second rotating shaft (341) is rotatably installed on the blocking block (34), a roller (342) is installed on the second rotating shaft (341), a torsion spring (343) is sleeved on the first rotating shaft (333), one end of the torsion spring (343) abuts against the blocking block (34), and the other end abuts against the fourth connecting plate (33), a second cylinder (35) is installed on the third connecting plate (31), and an output shaft of the second cylinder (35) passes through the third connecting plate (31) and the guide cylinder (32) and abuts against the blocking block (34).

8. The screw tightening device according to claim 1, characterized in that: The tightening assembly (4) comprises a first slide rail (411) and a second slide rail (421); the first slide rail (411) and the second slide rail (421) are mounted on the frame (12); a first slider (412) is slidably mounted on the first slide rail (411); a second slider (422) is slidably mounted on the second slide rail (421); a third slide rail (43) and a fourth slide rail (44) are simultaneously mounted on the first slider (412) and the second slider (422); a third slider (45) is simultaneously slidably mounted on the third slide rail (43) and the fourth slide rail (44); a connecting rod (46) is mounted on the third slider (45); a hanging ring (47) is mounted on the connecting rod (46); and a tightening gun (48) is mounted on the hanging ring (47).

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