Automatic bolt tightening and positioning device for automatic assembly line

Abstract

The invention relates to the technical field of automatic assembly equipment, in particular to an automatic assembly line bolt automatic tightening and positioning device which comprises a bottom plate, a supporting column fixedly connected to the upper end of the bottom plate, a lifting mechanism arranged in the supporting column, an adjusting mechanism arranged at the front end of the lifting mechanism, and a power mechanism arranged at the front end of the adjusting mechanism. A connecting assembly is arranged at the lower end of the power mechanism, a tightening assembly is arranged at the lower end of the connecting assembly, and the power mechanism provides power for the tightening assembly through the connecting assembly. A pressing assembly is arranged at the front end of the adjusting mechanism and used for fixing a workpiece. By arranging the adjusting mechanism, the distance between the two tightening assemblies is flexibly adjusted through the adjusting mechanism. By means of the design, the device can meet the assembling requirements of workpieces of different specifications, especially when the workpieces are provided with a plurality of assembling holes and the distance between the assembling holes is not fixed, the workpieces can be rapidly adjusted to the proper positions without replacing equipment or conducting complex debugging, and the working efficiency is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of automated assembly equipment technology, and in particular to an automatic bolt tightening and positioning device for automated assembly lines. Background Technology

[0002] In automated assembly lines, bolt tightening is a core process, and the automatic bolt tightening and positioning device, as a key piece of equipment, directly affects assembly accuracy and production efficiency. If a workpiece has four assembly holes, the bolts are usually tightened into the diagonally positioned assembly holes first. Therefore, under normal circumstances, the tightening process requires two automatic tightening and positioning devices to work simultaneously.

[0003] In existing technologies, automatic bolt tightening and positioning devices typically use bolts to fix two automatic tightening and positioning devices to the frame. This makes it difficult to adjust the distance between the two automatic tightening and positioning devices, which is troublesome when assembling workpieces of different specifications and affects work efficiency. Therefore, it is necessary to design an automatic bolt tightening and positioning device for automated assembly lines. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an automatic bolt tightening and positioning device for automated assembly lines.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an automatic bolt tightening and positioning device for an automated assembly line, comprising a base plate, a support column fixedly connected to the upper end of the base plate, a lifting mechanism disposed inside the support column, an adjusting mechanism disposed at the front end of the lifting mechanism, a power mechanism disposed at the front end of the adjusting mechanism, a connecting component disposed at the lower end of the power mechanism, a tightening component disposed at the lower end of the connecting component, and the power mechanism providing power to the tightening component through the connecting component; a holding component disposed at the front end of the adjusting mechanism, the holding component being used to fix the workpiece.

[0006] further:

[0007] The lifting mechanism includes a first motor, a lead screw, and a first moving block. The lead screw is rotatably connected inside the support column, and the first moving block is threaded onto the lead screw. The first motor is fixedly connected to the upper end of the support column, and the output end of the first motor is fixedly connected to the lead screw.

[0008] further:

[0009] The adjustment mechanism includes a square frame, a second motor, a bidirectional threaded rod, and a second movable block. The front end of the first movable block is fixedly connected to the square frame, and the bidirectional threaded rod is rotatably connected inside the square frame. The second movable block is threaded onto the bidirectional threaded rod. The side end of the square frame is fixedly connected to the second motor, and the output end of the second motor is fixedly connected to the bidirectional threaded rod.

[0010] further:

[0011] There are two second moving blocks, which are symmetrically distributed on the bidirectional threaded rod, and the internal threads of the two second moving blocks are in opposite directions.

[0012] further:

[0013] Both sides of the support column are fixedly connected to a first slide rail, and a first slider is slidably connected on the first slide rail. The first slider is fixedly connected to the square frame.

[0014] further:

[0015] The power mechanism includes a support plate, a third motor, a transmission shaft, a movable seat, a first bevel gear, a transmission cylinder, a second bevel gear, and a rotating shaft. The support plate is fixedly connected to the front end of the square frame. The transmission shaft is rotatably connected inside the support plate. The transmission shaft has cylindrical ends and a hexagonal prism in the middle. The third motor is fixedly connected to the side end of the support plate, and its output end is fixedly connected to the transmission shaft. The movable seat is fixedly connected to the front end of the second movable block. The transmission cylinder is rotatably connected to the side end of the movable seat. The transmission cylinder is slidably connected to the transmission shaft. The first bevel gear is fixedly connected to the circumferential surface of the transmission cylinder. A rotating shaft is rotatably connected to the lower end of the movable seat. The second bevel gear is fixedly connected to the upper end of the rotating shaft, and the second bevel gear meshes with the first bevel gear.

[0016] further:

[0017] The front end of the square frame is fixedly connected to a second slide rail, and a second slider is slidably connected on the second slide rail. The second slider is fixedly connected to the movable base.

[0018] further:

[0019] The connecting assembly includes a first connecting plate, a second connecting plate, a screw, and a nut. The lower end of the rotating shaft is fixedly connected to the first connecting plate, and the lower end of the first connecting plate is fixedly connected to the screw. The second connecting plate is sleeved on the screw, and the nut is threaded onto the screw.

[0020] further:

[0021] The tightening assembly includes a hexagonal drive post, a movable cylinder, a first spring, and a sleeve. The lower end of the second connecting plate is fixedly connected to the hexagonal drive post, and the movable cylinder is slidably connected to the hexagonal drive post. The lower end of the movable cylinder is fixedly connected to the sleeve. The movable cylinder is sleeved with a first spring. One end of the first spring is fixedly connected to the second connecting plate, and the other end of the first spring is fixedly connected to the sleeve.

[0022] further:

[0023] The pressing assembly includes a guide block, a guide rod, a second spring, and a pressure plate. The guide block is fixedly connected to the front end of the movable seat. The guide rod is slidably connected inside the guide block. The pressure plate is fixedly connected to the lower end of the guide rod. The second spring is provided on the guide rod. One end of the second spring is fixedly connected to the guide block, and the other end of the second spring is fixedly connected to the pressure plate.

[0024] The present invention has the following beneficial effects:

[0025] 1. Compared with existing technologies, this device, through the setting of an adjustment mechanism, enables flexible adjustment of the distance between the two tightening components. This design allows the device to adapt to the assembly requirements of workpieces of different specifications. In particular, when the workpiece has multiple assembly holes with variable hole spacing, it can be quickly adjusted to the appropriate position without changing equipment or performing complex adjustments, significantly improving work efficiency.

[0026] 2. Compared with the existing technology, this device is equipped with a support plate, a third motor, a transmission shaft, a movable seat, a first bevel gear, a transmission cylinder, a second bevel gear, and a rotating shaft. In use, the third motor works, driving the transmission shaft to rotate, which in turn drives the transmission cylinder inside the movable seat to rotate. As the transmission cylinder rotates, the first and second bevel gears work together to drive the rotating shaft to rotate. This allows power to be provided to both sets of tightening components simultaneously. This power transmission method is not only compact in structure but also has high transmission efficiency, ensuring that the two sets of tightening components work synchronously and stably, effectively reducing the investment in power sources. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention from a first-view perspective;

[0028] Figure 2 This is a schematic diagram of the overall structure of the invention from a second perspective;

[0029] Figure 3 This is a schematic diagram of the overall structure of the invention from a third-person perspective;

[0030] Figure 4 This is a schematic diagram of the internal structure of the present invention after a top-view cross-section;

[0031] Figure 5For the present invention Figure 4 Enlarged view of section A in the middle;

[0032] Figure 6 This is a first-view structural diagram of the power mechanism of the present invention after it is engaged with the connecting component, tightening component and holding component;

[0033] Figure 7 This is a second-view structural schematic diagram of the power mechanism of the present invention after it is engaged with the connecting component, tightening component and holding component;

[0034] Figure 8 For the present invention Figure 7 Enlarged view of section B.

[0035] Legend:

[0036] 1. Base plate; 2. Support column; 3. Lifting mechanism; 301. First motor; 302. Lead screw; 303. First moving block; 4. Adjusting mechanism; 401. Square frame; 402. Second motor; 403. Bidirectional threaded rod; 404. Second moving block; 5. Power mechanism; 501. Support plate; 502. Third motor; 503. Drive shaft; 504. Moving seat; 505. First bevel gear; 506. Drive cylinder; 507. Second bevel gear; 5 8. Rotating shaft; 6. Connecting assembly; 601. First connecting plate; 602. Second connecting plate; 603. Screw; 604. Nut; 7. Tightening assembly; 701. Hexagonal transmission column; 702. Moving cylinder; 703. First spring; 704. Sleeve; 8. Holding assembly; 801. Guide block; 802. Guide rod; 803. Second spring; 804. Pressure plate; 9. First slide rail; 10. First slider; 11. Second slide rail; 12. Second slider. Detailed Implementation

[0037] Reference Figure 1-8 The present invention provides an automatic bolt tightening and positioning device for an automated assembly line, comprising a base plate 1, a support column 2 fixedly connected to the upper end of the base plate 1, a lifting mechanism 3 disposed inside the support column 2, an adjusting mechanism 4 disposed at the front end of the lifting mechanism 3, a power mechanism 5 disposed at the front end of the adjusting mechanism 4, a connecting component 6 disposed at the lower end of the power mechanism 5, and a tightening component 7 disposed at the lower end of the connecting component 6. The power mechanism 5 provides power to the tightening component 7 through the connecting component 6. A holding component 8 is disposed at the front end of the adjusting mechanism 4, and the holding component 8 is used to fix the workpiece.

[0038] In use, first, fix the base plate 1 to the corresponding position on the automated assembly line according to requirements. Then, adjust the distance between the two tightening components 7 according to the workpiece specifications. When adjusting the distance between the two tightening components 7, the adjusting mechanism 4 works, and with the cooperation of the connecting component 6, it can drive the two tightening components 7 to move, thereby changing the distance between the two tightening components 7. After adjusting the distance between the two tightening components 7, the lifting mechanism 3 works, driving the tightening components 7 to move down, so that the tightening components 7 are close to the bolt on the workpiece. Then, the power mechanism 5 works, which can simultaneously provide power to the two sets of tightening components 7, so that the bolt can be tightened onto the workpiece. During the bolt tightening process, the holding component 8 works synchronously, so that the holding component 8 firmly presses the workpiece, preventing the workpiece from shifting during the tightening process and ensuring the tightening accuracy. When encountering workpieces of different specifications, simply adjust the distance between the two tightening components 7 again through the adjusting mechanism 4, and adjust the height of the tightening components 7 through the lifting mechanism 3, so as to quickly adapt to the new assembly requirements without replacing the entire device or performing complex debugging, which greatly improves the production efficiency and flexibility of the assembly line.

[0039] The lifting mechanism 3 includes a first motor 301, a lead screw 302, and a first moving block 303. The lead screw 302 is rotatably connected inside the support column 2, and the first moving block 303 is threadedly connected to the lead screw 302. The first motor 301 is fixedly connected to the upper end of the support column 2, and the output end of the first motor 301 is fixedly connected to the lead screw 302. When working, the first motor 301 works, which drives the lead screw 302 to rotate, thereby driving the first moving block 303 to slide inside the support column 2. This allows the height of the tightening assembly 7 to be adjusted so that the tightening assembly 7 can be closer to the workpiece.

[0040] The adjusting mechanism 4 includes a square frame 401, a second motor 402, a bidirectional threaded rod 403, and a second moving block 404. The front end of the first moving block 403 is fixedly connected to the square frame 401, and the bidirectional threaded rod 403 is rotatably connected inside the square frame 401. The second moving block 404 is threadedly connected to the bidirectional threaded rod 403. The second motor 402 is fixedly connected to the side end of the square frame 401, and the output end of the second motor 402 is fixedly connected to the bidirectional threaded rod 403. There are two second moving blocks 404, which are symmetrically distributed on the bidirectional threaded rod 403, and the internal threads of the two second moving blocks 404 have opposite directions. During operation, the second motor 402 operates, driving the bidirectional threaded rod 403 to rotate. Since the internal threads of the two second moving blocks 404 are in opposite directions, the two second moving blocks 404 will move in opposite or opposite directions along the bidirectional threaded rod 403, thereby driving the moving seat 504 and the tightening assembly 7, which are fixedly connected to the second moving blocks 404, to move, thereby adjusting the distance between the two tightening assemblies 7 to adapt to the assembly requirements of workpieces of different specifications.

[0041] The support column 2 is fixedly connected to the first slide rail 9 on both sides. The first slider 10 is slidably connected to the first slide rail 9. The first slider 10 is fixedly connected to the square frame 401. During operation, by setting the first slide rail 9 and the first slider 10, the movement of the square frame 401 can be limited, so that the square frame 401 can move vertically stably.

[0042] The power mechanism 5 includes a support plate 501, a third motor 502, a transmission shaft 503, a movable seat 504, a first bevel gear 505, a transmission cylinder 506, a second bevel gear 507, and a rotating shaft 508. The support plate 501 is fixedly connected to the front end of the square frame 401. The transmission shaft 503 is rotatably connected inside the support plate 501. The transmission shaft 503 has cylindrical ends and a hexagonal prism in the middle. The third motor 502 is fixedly connected to the side end of the support plate 501. The output end of the third motor 502 is fixedly connected to the transmission shaft 503. The front end of the second moving block 404 is fixedly connected to a moving base 504. A transmission cylinder 506 is rotatably connected inside the side end of the moving base 504. The transmission cylinder 506 is slidably connected to the transmission shaft 503. A first bevel gear 505 is fixedly connected to the circumferential surface of the transmission cylinder 506. A rotating shaft 508 is rotatably connected inside the lower end of the moving base 504. A second bevel gear 507 is fixedly connected to the upper end of the rotating shaft 508. The second bevel gear 507 meshes with the first bevel gear 505. During operation, as the second moving block 404 moves, it also... The movable seat 504 moves, thereby causing the transmission cylinder 506 to slide on the transmission shaft 503. After adjusting the distance between the two tightening components 7, the third motor 502 operates, driving the transmission shaft 503 to rotate. Since the transmission cylinder 506 is slidably connected to the transmission shaft 503 and the first bevel gear 505 is fixedly connected to the circumference of the transmission cylinder 506, the rotation of the transmission shaft 503 will drive the transmission cylinder 506 and the first bevel gear 505 to rotate. Furthermore, because the lower end of the movable seat 504 is rotatably connected to a rotating shaft... 508, the upper end of the rotating shaft 508 is fixedly connected to the second bevel gear 507, and the second bevel gear 507 meshes with the first bevel gear 505. Therefore, under the drive of the first bevel gear 505, the second bevel gear 507 and the rotating shaft 508 will rotate accordingly. In this way, the power can be transmitted to the connecting component 6 through the rotating shaft 508, thereby providing power to the tightening component 7 and realizing the bolt tightening operation. Since both transmission cylinders 506 are sleeved on the transmission shaft 503, power can be provided to both sets of tightening components 7 at the same time.

[0043] A second slide rail 11 is fixedly connected to the front end of the square frame 401. A second slider 12 is slidably connected to the second slide rail 11. The second slider 12 is fixedly connected to the movable seat 504. During operation, by setting the second slide rail 11 and the second slider 12, the movement of the movable seat 504 can be limited, so that the movable seat 504 can move stably.

[0044] The connecting assembly 6 includes a first connecting plate 601, a second connecting plate 602, a screw 603, and a nut 604. The first connecting plate 601 is fixedly connected to the lower end of the rotating shaft 508, and the screw 603 is fixedly connected to the lower end of the first connecting plate 601. The second connecting plate 602 is sleeved on the screw 603, and the nut 604 is threadedly connected to the screw 603. During operation, when installing the tightening assembly 7, the second connecting plate 602 is sleeved on the screw 603, and then the nut 604 is tightened. At this time, the tightening assembly 7 can be installed at the lower end of the rotating shaft 508, so that the rotating shaft 508 can drive the tightening assembly 7 to rotate.

[0045] The tightening assembly 7 includes a hexagonal drive column 701, a movable cylinder 702, a first spring 703, and a sleeve 704. The hexagonal drive column 701 is fixedly connected to the lower end of the second connecting plate 602. The movable cylinder 702 is slidably connected to the hexagonal drive column 701. The sleeve 704 is fixedly connected to the lower end of the movable cylinder 702. The first spring 703 is sleeved on the outside of the movable cylinder 702. One end of the first spring 703 is fixedly connected to the second connecting plate 602, and the other end of the first spring 703 is fixedly connected to the sleeve 704. During operation, as the lifting mechanism 3 moves downward, it will drive the sleeve 704 to move downward. When the sleeve 704 contacts the bolt on the workpiece, because the sleeve 704 does not correspond to the bolt head, the sleeve 704 will be squeezed upward, which will drive the movable cylinder 702 to slide on the hexagonal transmission column 701, thereby compressing the first spring 703. During the tightening operation, the sleeve 704 will be driven to rotate under the cooperation of the hexagonal transmission column 701 and the movable cylinder 702. When the groove of the sleeve 704 corresponds to the nut of the bolt, the sleeve 704 will be fitted on the nut of the bolt under the cooperation of the compression of the first spring 703, thereby driving the bolt to be tightened.

[0046] The pressing assembly 8 includes a guide block 801, a guide rod 802, a second spring 803, and a pressure plate 804. The guide block 801 is fixedly connected to the front end of the movable seat 504. The guide rod 802 is slidably connected inside the guide block 801. The pressure plate 804 is fixedly connected to the lower end of the guide rod 802. The second spring 803 is provided on the guide rod 802. One end of the second spring 803 is fixedly connected to the guide block 801, and the other end of the second spring 803 is fixedly connected to the pressure plate 804. During operation, as the tightening assembly 7 moves downward during the tightening of the bolt, the pressure plate 804 will first contact the surface of the workpiece. Since the guide rod 802 can slide inside the guide block 801, and the second spring 803 is provided on the guide rod 802, when the pressure plate 804 contacts the workpiece, it will squeeze the pressure plate 804 to move upward, thereby compressing the second spring 803. The compressed second spring 803 will generate a downward elastic force, causing the pressure plate 804 to tightly press the workpiece. This design ensures that the workpiece will not shift due to the tightening force during the tightening process.

[0047] Working Principle: In use, the base plate 1 is first fixed to the corresponding position on the automated assembly line according to requirements. When tightening bolts on the workpiece is required, the second motor 402 in the adjusting mechanism 4 is activated according to the workpiece specifications. The second motor 402 drives the bidirectional threaded rod 403 to rotate. Since the internal threads of the two second moving blocks 404 have opposite directions, the two second moving blocks 404 will move in opposite or opposite directions along the bidirectional threaded rod 403, thereby driving the moving seat 504 and tightening assembly 7, which are fixedly connected to the second moving blocks 404, to move, achieving precise adjustment of the distance between the two tightening assemblies 7 to adapt to the assembly requirements of workpieces of different specifications. Next, the first motor 301 in the lifting mechanism 3 is activated. The first motor 301 drives the lead screw 302 to rotate, thereby causing the first moving block 303 to slide inside the support column 2, thus adjusting the height of the tightening assembly 7 and bringing it closer to the bolts on the workpiece. After adjusting the distance and height between the two tightening components 7, the third motor 502 in the power mechanism 5 is started. The third motor 502 drives the transmission shaft 503 to rotate. Since the transmission cylinder 506 is slidably connected to the transmission shaft 503 and the first bevel gear 505 is fixedly connected to the circumference of the transmission cylinder 506, the rotation of the transmission shaft 503 will drive the transmission cylinder 506 and the first bevel gear 505 to rotate. Since the lower end of the moving seat 504 is rotatably connected to the rotating shaft 508, and the upper end of the rotating shaft 508 is fixedly connected to the second bevel gear 507, and the second bevel gear 507 meshes with the first bevel gear 505, the second bevel gear 507 and the rotating shaft 508 will rotate under the drive of the first bevel gear 505. The rotating shaft 508 transmits power to the tightening component 7 through the connecting component 6. At this time, with the cooperation of the tightening component 7, the workpiece bolt can be tightened. Simultaneously, during the bolt tightening process, the holding assembly 8 also begins to work. As the tightening assembly 7 moves downward, the pressure plate 804 first contacts the workpiece surface, causing it to move upward and compress the second spring 803. The compressed second spring 803 generates a downward elastic force, causing the pressure plate 804 to firmly press the workpiece, preventing displacement during tightening and ensuring tightening accuracy. When encountering workpieces of different specifications, simply adjust the distance between the two tightening assemblies 7 using the adjusting mechanism 4 and adjust the height of the tightening assembly 7 using the lifting mechanism 3. This allows for quick adaptation to new assembly requirements without replacing the entire device or performing complex adjustments, greatly improving the production efficiency and flexibility of the assembly line.

[0048] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic bolt tightening and positioning device for an automated assembly line, comprising a base plate (1), characterized in that: The base plate (1) is fixedly connected to a support column (2) at its upper end. The support column (2) is equipped with a lifting mechanism (3). The lifting mechanism (3) is equipped with an adjustment mechanism (4) at its front end. The adjustment mechanism (4) is equipped with a power mechanism (5) at its front end. The power mechanism (5) is equipped with a connecting component (6) at its lower end. The connecting component (6) is equipped with a tightening component (7) at its lower end. The power mechanism (5) provides power to the tightening component (7) through the connecting component (6). The adjustment mechanism (4) is equipped with a pressing component (8) at its front end. The pressing component (8) is used to fix the workpiece.

2. The automatic bolt tightening and positioning device for an automated assembly line according to claim 1, characterized in that: The lifting mechanism (3) includes a first motor (301), a lead screw (302) and a first moving block (303). The lead screw (302) is rotatably connected inside the support column (2), and the first moving block (303) is threadedly connected to the lead screw (302). The first motor (301) is fixedly connected to the upper end of the support column (2), and the output end of the first motor (301) is fixedly connected to the lead screw (302).

3. The automatic bolt tightening and positioning device for an automated assembly line according to claim 2, characterized in that: The adjustment mechanism (4) includes a square frame (401), a second motor (402), a bidirectional threaded rod (403), and a second moving block (404). The front end of the first moving block (303) is fixedly connected to the square frame (401). The bidirectional threaded rod (403) is rotatably connected inside the square frame (401). The second moving block (404) is threadedly connected to the bidirectional threaded rod (403). The side end of the square frame (401) is fixedly connected to the second motor (402). The output end of the second motor (402) is fixedly connected to the bidirectional threaded rod (403).

4. The automatic bolt tightening and positioning device for an automated assembly line according to claim 3, characterized in that: There are two second moving blocks (404), which are symmetrically distributed on the bidirectional threaded rod (403), and the internal threads of the two second moving blocks (404) are opposite in direction.

5. The automatic bolt tightening and positioning device for an automated assembly line according to claim 3, characterized in that: The support column (2) is fixedly connected to both sides of the first slide rail (9), and the first slider (10) is slidably connected on the first slide rail (9). The first slider (10) is fixedly connected to the square frame (401).

6. The automatic bolt tightening and positioning device for an automated assembly line according to claim 3, characterized in that: The power mechanism (5) includes a support plate (501), a third motor (502), a transmission shaft (503), a movable seat (504), a first bevel gear (505), a transmission cylinder (506), a second bevel gear (507), and a rotating shaft (508). The support plate (501) is fixedly connected to the front end of the square frame (401). The transmission shaft (503) is rotatably connected inside the support plate (501). The transmission shaft (503) is cylindrical at both ends and hexagonal in the middle. The third motor (502) is fixedly connected to the side end of the support plate (501). The output end of the third motor (502) The second moving block (404) is fixedly connected to the drive shaft (503); the front end of the second moving block (404) is fixedly connected to the moving seat (504), the side end of the moving seat (504) is rotatably connected to the drive cylinder (506), the drive cylinder (506) is slidably connected to the drive shaft (503), the circumferential surface of the drive cylinder (506) is fixedly connected to the first bevel gear (505); the lower end of the moving seat (504) is rotatably connected to the rotating shaft (508), the upper end of the rotating shaft (508) is fixedly connected to the second bevel gear (507), the second bevel gear (507) meshes with the first bevel gear (505).

7. The automatic bolt tightening and positioning device for an automated assembly line according to claim 6, characterized in that: The front end of the square frame (401) is fixedly connected to a second slide rail (11), and a second slider (12) is slidably connected on the second slide rail (11). The second slider (12) is fixedly connected to the movable seat (504).

8. The automatic bolt tightening and positioning device for an automated assembly line according to claim 6, characterized in that: The connecting assembly (6) includes a first connecting plate (601), a second connecting plate (602), a screw (603), and a nut (604). The lower end of the rotating shaft (508) is fixedly connected to the first connecting plate (601), and the lower end of the first connecting plate (601) is fixedly connected to the screw (603). The second connecting plate (602) is sleeved on the screw (603), and the nut (604) is threaded onto the screw (603).

9. The automatic bolt tightening and positioning device for an automated assembly line according to claim 8, characterized in that: The tightening assembly (7) includes a hexagonal drive column (701), a movable cylinder (702), a first spring (703), and a sleeve (704). The lower end of the second connecting plate (602) is fixedly connected to the hexagonal drive column (701). The movable cylinder (702) is slidably connected to the hexagonal drive column (701). The lower end of the movable cylinder (702) is fixedly connected to the sleeve (704). The movable cylinder (702) is sleeved with the first spring (703). One end of the first spring (703) is fixedly connected to the second connecting plate (602), and the other end of the first spring (703) is fixedly connected to the sleeve (704).

10. The automatic bolt tightening and positioning device for an automated assembly line according to claim 6, characterized in that: The pressing assembly (8) includes a guide block (801), a guide rod (802), a second spring (803), and a pressure plate (804). The guide block (801) is fixedly connected to the front end of the movable seat (504). The guide rod (802) is slidably connected inside the guide block (801). The pressure plate (804) is fixedly connected to the lower end of the guide rod (802). The second spring (803) is provided on the guide rod (802). One end of the second spring (803) is fixedly connected to the guide block (801), and the other end of the second spring (803) is fixedly connected to the pressure plate (804).

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