Bolt tightening device

Abstract

The utility model discloses a bolt tightening device which is used for tightening a bolt on a thrust wheel and connecting the thrust wheel with a chassis of an excavator, and the bolt tightening device comprises a mechanical arm assembly, a tightening assembly and a control system, the mechanical arm assembly is used for moving the tightening assembly; the visual mechanism is used for shooting the thrust wheel, and the upper end of the tightening assembly is connected with the mechanical arm assembly; and the control system is connected with the tightening mechanism, the visual mechanism and the mechanical arm assembly, and the control system can control the mechanical arm assembly to move the tightening mechanism according to a picture shot by the visual mechanism so as to tighten the bolt. In the whole process, the bolts only need to be manually placed, automatic tightening is conducted through the control system, efficiency is high, manpower resources are saved, and potential safety hazards caused by manual bolt tightening are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of excavator production equipment, in particular to a bolt tightening device. Background Art

[0002] An excavator is an earth-moving machine that uses a bucket to dig materials above or below the surface of the machine and load them into a transport vehicle or unload them to a stockpile. The excavated materials are mainly soil, coal, silt, and pre-loosened soil and rock. From the development of construction machinery in recent years, the development of excavators has been relatively fast, and excavators have become one of the most important construction machinery in engineering construction.

[0003] During the production process of the excavator, the tightening of the supporting wheel bolts on the excavator chassis requires a torque of 400 Nm to 1500 Nm. In the prior art, workers use mechanical torque wrenches to tighten the bolts to ensure that the specified torque is reached. This technical solution requires the cooperation of multiple people, one person is responsible for holding the torque wrench, one person is responsible for adding force, and one person is responsible for protecting the safety of the person adding force to prevent slipping and causing injuries. Only one bolt can be tightened at a time. When different torques are required, the torque of the torque wrench needs to be manually adjusted, resulting in large manpower requirements, low efficiency, high rate of worker misoperation, and high risk of worker injury. Summary of the invention

[0004] The technical problem to be solved by the utility model is that it is difficult to tighten the bolts on the supporting wheels of the excavator.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a bolt tightening device for tightening the bolts on the supporting wheel to connect the supporting wheel to the chassis of the excavator, and the bolt tightening device comprises: a mechanical arm assembly, a tightening assembly and a control system;

[0006] The mechanical arm assembly is used to move the tightening assembly;

[0007] The tightening assembly includes: a tightening mechanism and a visual mechanism, the tightening mechanism includes: a fixing plate, a fixing column and a tightening gun, the tightening gun is arranged on the fixing plate, the fixing plate is connected to the fixing column, the visual mechanism is arranged on the fixing column, the visual mechanism is used to photograph the supporting roller, and the upper end of the fixing column is connected to the mechanical arm assembly;

[0008] The control system is connected to the tightening mechanism, the visual mechanism and the mechanical arm assembly. The control system can control the mechanical arm assembly to move the tightening mechanism according to the image captured by the visual mechanism to tighten the bolt.

[0009] According to another specific embodiment of the utility model, the tightening gun includes: a first tightening gun;

[0010] The fixing plate is provided with a moving mechanism, and the moving mechanism is used for driving the first tightening gun to move.

[0011] According to another specific embodiment of the utility model, the moving mechanism includes: a slide rail, a slider, an adjustment plate and a driving mechanism;

[0012] The slide rail is arranged on the fixed plate, the slider is slidably arranged on the slide rail, the adjustment plate is fixed on the slider, the first tightening gun is arranged on the adjustment plate, an adjustment hole is opened on the fixed plate, and the adjustment hole is arranged corresponding to the moving position of the first tightening gun, the driving mechanism is arranged on the adjustment plate, and the driving mechanism is used to drive the slider to move on the slide rail.

[0013] According to another specific embodiment of the utility model, the driving mechanism includes: a driving motor, a gear and a rack;

[0014] The driving motor is arranged on the adjusting plate, the output end of the driving motor passes through the adjusting plate and is connected with the gear, the rack is arranged on the side of the fixing plate, and the rack is meshed with the gear.

[0015] According to another specific embodiment of the utility model, a limiting member is provided on the fixing plate;

[0016] The limiting member is arranged corresponding to the sliding direction of the slider, and the limiting member is used to limit the moving range of the slider.

[0017] According to another specific embodiment of the utility model, the tightening gun further includes: a second tightening gun, the first tightening gun and the second tightening gun are respectively arranged on both sides of the fixing column;

[0018] Both sides of the chassis are provided with mounting grooves, the supporting rollers are arranged on the mounting grooves, and the two ends of the supporting rollers are respectively arranged on the groove walls on both sides of the mounting grooves, and the two ends of the supporting rollers are provided with first mounting holes, and the distance between the first mounting holes at the two ends of the supporting rollers matches the distance between the first tightening gun and the second tightening gun, and the groove wall of the mounting groove is provided with second mounting holes, the second mounting holes are arranged corresponding to the first mounting holes, and the bolts are arranged on the first mounting holes.

[0019] According to another specific embodiment of the utility model, the visual mechanism includes: a connecting plate, an adjustment column and a shooting device;

[0020] The connecting plate is connected to the fixing column, one end of the adjusting column is connected to the connecting plate and the other end is connected to the photographing device, the adjusting column can adjust the length, and the photographing device is used to photograph the supporting wheel.

[0021] According to another specific embodiment of the utility model, the mechanical arm assembly includes: a mechanical arm, a crossbeam frame, a rotating member and a rotating member;

[0022] The mechanical arm is arranged upside down, one end of the mechanical arm is fixed on the crossbeam frame, and the other end is connected to the rotating member, one end of the rotating member is connected to the rotating member, and the output end of the rotating member is connected to the fixed column.

[0023] According to another specific embodiment of the utility model, it also includes: a material loading assembly; the chassis is arranged on the material loading assembly, and the material loading assembly includes: a material loading platform, universal wheels and a rotating mechanism;

[0024] The universal wheel is arranged on the loading platform, the rotating mechanism is arranged on the loading platform, and one end of the rotating mechanism is connected to the chassis.

[0025] According to another specific embodiment of the present utility model, the control system is connected to the material loading assembly, and the control system is also suitable for controlling the material loading assembly to move to the next workstation after the tightening assembly tightens all the bolts on the supporting wheel.

[0026] The utility model provides a bolt tightening device, which has the following beneficial effects:

[0027] The utility model enables a worker to place bolts on mounting holes on the supporting wheels that need to be connected, and to photograph the supporting wheels on the chassis of the excavator through a visual mechanism. The control system controls a mechanical arm assembly to move a tightening mechanism according to the photographed image, so that the tightening mechanism is connected to the bolts on the supporting wheels, and the bolts are tightened through the tightening mechanism to fix the supporting wheels on the chassis of the excavator. The entire process only requires manual placement of the bolts, which are automatically tightened through the control system, and is highly efficient and saves human resources, thereby avoiding the potential safety hazards caused by manual tightening of the bolts. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0029] Figure 1 A three-dimensional diagram of a bolt tightening device of the utility model is schematically shown;

[0030] Figure 2 A schematic diagram shows a front view of a bolt tightening device of the utility model;

[0031] Figure 3 The utility model schematically shows a front view of a tightening assembly of a bolt tightening device;

[0032] Figure 4 The utility model schematically shows a tightening mechanism structure diagram of a bolt tightening device;

[0033] Figure 5 The chassis structure diagram of a bolt tightening device of the utility model is schematically shown;

[0034] Figure 6 A schematic diagram shows a top view of a chassis of a bolt tightening device of the utility model;

[0035] Figure 7 Schematically shows Figure 6 Enlarged view of point A in the middle.

[0036] The reference numerals in the figure are: 1 is a robot arm assembly, 11 is a robot arm, 12 is a crossbeam frame, 13 is a rotating part, 14 is a rotating part, 2 is a tightening assembly, 3 is a tightening mechanism, 31 is a fixed plate, 32 is a fixed column, 33 is a first tightening gun, 34 is a second tightening gun, 35 is a slide rail, 36 is a slider, 37 is an adjustment plate, 38 is an adjustment hole, 39 is a limiter, 4 is a visual mechanism, 41 is a connecting plate, 42 is an adjustment column, 43 is a shooting box, 5 is a loading assembly, 51 is a loading platform, 52 is a rotating mechanism, 6 is a chassis, 61 is a mounting groove, 62 is a supporting wheel, 63 is a first mounting hole, 71 is a driving motor, 72 is a gear, and 73 is a rack. DETAILED DESCRIPTION

[0037] The following specific embodiments illustrate the implementation of the present invention, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this invention are limited to this implementation. On the contrary, the purpose of introducing the invention in conjunction with the implementation is to cover other options or modifications that may extend based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0038] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0040] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "provided with", "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0041] like Figures 1 to 3 A bolt tightening device is shown, which is used to tighten the bolts on the supporting wheel 62 to connect the supporting wheel 62 to the chassis 6 of the excavator. The bolt tightening device includes: a mechanical arm assembly 1, a tightening assembly 2 and a control system.

[0042] The mechanical arm assembly 1 is used to move the tightening assembly 2. The tightening assembly 2 includes: a tightening mechanism 3 and a visual mechanism 4. The tightening mechanism 3 includes: a fixing plate 31, a fixing column 32 and a tightening gun. The tightening gun is arranged on the fixing plate 31. The fixing plate 31 is connected to the fixing column 32. The visual mechanism 4 is arranged on the fixing column 32. The visual mechanism 4 is used to photograph the supporting roller 62. The upper end of the fixing column 32 is connected to the mechanical arm assembly 1. The control system connects the tightening mechanism 3, the visual mechanism 4 and the mechanical arm assembly 1. The control system can control the mechanical arm assembly 1 to move the tightening mechanism 3 according to the picture photographed by the visual mechanism 4 to tighten the bolt.

[0043] In the present application, a worker places bolts on the supporting wheel 62, and photographs the supporting wheel 62 on the excavator chassis 6 through the visual mechanism 4. The control system controls the mechanical arm assembly 1 to move the tightening mechanism 3 according to the photographed image, so that the tightening mechanism 3 is connected with the bolts on the supporting wheel 62, and the bolts are tightened by the tightening mechanism 3 to fix the supporting wheel 62 on the chassis 6 of the excavator. The whole process only requires manual placement of the bolts, which are automatically tightened through the control system, which is efficient and saves human resources, and avoids the safety hazards caused by manual tightening of the bolts.

[0044] like Figure 1 to Figure 2 As shown, the control system is connected to the material carrying assembly 5 , and the control system controls the material carrying assembly 5 to move to the next station after the tightening assembly 2 tightens all the bolts on the supporting wheel 62 .

[0045] After the tightening assembly 2 has tightened all the bolts on the supporting wheels 62, the control system will control the loading assembly 5 to transport the excavator chassis 6 to the next workstation for the next production process.

[0046] like Figures 1 to 4 As shown, the tightening gun includes: a first tightening gun 33. A moving mechanism is provided on the fixing plate 31, and the moving mechanism is used to drive the first tightening gun 33 to move.

[0047] The bolts on the supporting roller 62 are tightened by the first tightening gun 33. The tightening assembly 2 can be moved by the mechanical arm assembly 1 to change the position of the first tightening gun 33, or the position of the first tightening gun 33 can be moved by the moving mechanism so that the first tightening gun 33 tightens the bolts at different positions on the supporting roller 62.

[0048] like Figures 1 to 4 As shown, the moving mechanism includes: a slide rail 35, a slider 36, an adjustment plate 37 and a driving mechanism. The slide rail 35 is arranged on the fixed plate 31, the slider 36 is slidably arranged on the slide rail 35, the adjustment plate 37 is fixed on the slider 36, the first tightening gun 33 is arranged on the adjustment plate 37, the fixed plate 31 is provided with an adjustment hole 38, and the adjustment hole 38 is arranged corresponding to the moving position of the first tightening gun 33, and the driving mechanism is arranged on the adjustment plate 37, and the driving mechanism is used to drive the slider 36 to move on the slide rail 35. The driving mechanism includes: a driving motor 71, a gear 72 and a rack 73. The driving motor 71 is arranged on the adjustment plate 37, and the output end of the driving motor 71 is connected to the gear 72 through the adjustment plate 37, and the rack 73 is arranged on the side of the fixed plate 31, and the rack 73 is meshed with the gear 72.

[0049] The driving motor 71 drives the gear 72 to rotate, and through the meshing of the gear 72 and the rack 73 and the cooperation of the slider 36 and the slide rail 35, the adjustment plate 37 moves in the direction of the rack 73, thereby adjusting the position of the first tightening gun 33, making it easier for the first tightening gun 33 to tighten the bolts on the supporting wheel 62.

[0050] like Figure 4 As shown, a limiter 39 is disposed on the fixing plate 31 ; the limiter 39 is disposed corresponding to the sliding direction of the slider 36 , and the limiter 39 is used to limit the movement range of the slider 36 .

[0051] In this embodiment, the top height of the stopper 39 is higher than the bottom height of the adjustment plate 37, so that the adjustment plate 37 cannot pass through the stopper 39, thereby preventing the slider 36 from being separated from the slide rail 35 during the movement of the first tightening gun 33. In other embodiments, the stopper 39 may be provided at the end of the slide rail 35, or at both ends of the rack 73, which can also prevent the slider 36 from being separated from the slide rail 35.

[0052] like Figures 4 to 7 As shown, the tightening gun further includes: a second tightening gun 34, and the first tightening gun 33 and the second tightening gun 34 are respectively arranged on both sides of the fixing column 32. Both sides of the chassis 6 are provided with mounting grooves 61, the supporting roller 62 is arranged on the mounting groove 61, and both ends of the supporting roller 62 are respectively arranged on the groove walls on both sides of the mounting groove 61, and both ends of the supporting roller 62 are respectively provided with first mounting holes 63, and the distance between the first mounting holes 63 at both ends of the supporting roller 62 matches the distance between the first tightening gun 33 and the second tightening gun 34, and the groove wall of the mounting groove 61 is provided with a second mounting hole, and the second mounting hole is arranged corresponding to the first mounting hole 63, and the bolt is arranged on the first mounting hole 63.

[0053] In this embodiment, two first mounting holes 63 are respectively provided at both ends of the supporting wheel 62, and the four first mounting holes 63 form a rectangle. According to the distance between the first mounting holes 63 at both ends, the position of the first tightening gun 33 is adjusted by a moving mechanism, thereby adjusting the distance between the first tightening gun 33 and the second tightening gun 34, so that the first tightening gun 33 and the second tightening gun 34 can tighten the bolts on the first mounting holes 63 at both ends of the supporting wheel 62 at the same time.

[0054] like Figures 1 to 3 As shown, the visual mechanism 4 includes: a connecting plate 41, an adjusting column 42 and a photographing device 43. The connecting plate 41 is connected to the fixing column 32, one end of the adjusting column 42 is connected to the connecting plate 41, and the other end is connected to the photographing device 43, the adjusting column 42 can adjust the length, and the photographing device 43 is used to photograph the supporting wheel 62.

[0055] The visual mechanism 4 is connected to the fixed column 32 through the connecting plate 41, so that the robot arm assembly 1 can move the visual mechanism 4, move the shooting device 43 to the shooting location, shoot the supporting wheel 62 through the shooting device 43, and transmit the shot picture to the control system, so that the control system moves the tightening mechanism 3 according to the shot picture to tighten the bolts on the supporting wheel 62.

[0056] In this embodiment, the shooting position of the visual mechanism 4 can be adjusted according to the model of the excavator chassis 6 and the model of the supporting wheel 62 to ensure that the captured picture can completely capture the supporting wheel 62. The height of the shooting device 43 can be adjusted by adjusting the column 42. By raising the height of the shooting device 43, the captured picture can be increased, so that the visual mechanism 4 can be suitable for shooting different models of excavator chassis 6.

[0057] like Figures 1 to 3 As shown, the robot arm assembly 1 includes: a robot arm 11, a crossbeam frame 12, a rotating member 13 and a rotating member 14. The crossbeam frame 12 is arranged above the chassis 6, and the robot arm 11 is arranged upside down, one end of the robot arm 11 is fixed to the crossbeam frame 12, and the other end is connected to the rotating member 13, one end of the rotating member 13 is connected to the rotating member 14, and the output end of the rotating member 14 is connected to the fixed column 32.

[0058] The crossbeam frame 12 is U-shaped, the chassis 6 of the excavator is located inside the crossbeam frame 12, the mechanical arm 11 is arranged above the chassis 6 of the excavator, and the bottom of the mechanical arm 11 is fixedly connected to the crossbeam frame 12, so that the mechanical arm 11 is arranged upside down, which is convenient for the mechanical arm 11 to move the tightening assembly 2. The tightening assembly 2 is rotatably connected to the mechanical arm 11 through the rotating member 13, so that the tightening assembly 2 always maintains a vertical horizontal plane during the process of the mechanical arm 11 moving the tightening assembly 2, ensuring that the tightening gun can tighten the bolt. The tightening assembly 2 can be rotated by the rotating member 14, which is convenient for aligning the tightening gun with the bolt on the supporting wheel 62, thereby increasing the tightening speed of the bolt.

[0059] like Figures 5 to 7 As shown, it includes: a loading assembly 5; the chassis 6 is arranged on the loading assembly 5, and the loading assembly 5 includes: a loading platform 5, a universal wheel and a rotating mechanism 52. The universal wheel is arranged on the loading platform 5, and the rotating mechanism 52 is arranged on the loading platform 5, and one end of the rotating mechanism 52 is connected to the chassis 6.

[0060] The excavator chassis 6 on the loading assembly 5 can be moved by the universal wheel, and the excavator chassis 6 can be moved to different workstations to improve the production efficiency of the excavator chassis 6. The excavator chassis 6 can be rotated by the rotating mechanism 52 so that the excavator chassis 6 can be rotated to the required processing angle to improve the production efficiency.

[0061] In general, the present application provides a bolt tightening device, in which a worker places a bolt on a first mounting hole 63 on a supporting wheel 62 that needs to be connected, and a mechanical arm assembly 1 moves the tightening assembly 2, moves the visual mechanism 4 to a shooting location, and shoots the supporting wheel 62 on the excavator chassis 6 through the visual mechanism 4. The control system analyzes the shooting picture, and the control system establishes a three-dimensional coordinate system with the midpoint of the rectangle surrounded by the four first mounting holes 63 as the coordinate origin and assigns the coordinate axes X, Y, and Z. The control system obtains the offset RX, RY, and RZ of the tightening mechanism 3 required to be moved by the mechanical arm assembly 1 through calculation and analysis, and the control system controls the mechanical arm assembly 1 to move the tightening assembly 2 so that the midpoint between the first tightening gun 33 and the second tightening gun 34 is above the coordinate origin, and then the tightening assembly 2 is lowered to tighten the bolt. After the bolt is tightened, the visual mechanism 4 is moved to the next shooting location through the mechanical arm assembly 1, and the above process is repeated until all the bolts on the supporting wheels 62 are tightened, and the control system controls the loading assembly 5 to transport the excavator chassis 6 to the next station for the next production process.

[0062] In this embodiment, after the midpoint between the first tightening gun 33 and the second tightening gun 34 is above the coordinate origin, the moving assembly adjusts the distance between the first tightening gun 33 and the second tightening gun 34, and the tightening assembly 2 is rotated by the rotating member 14 so that the first tightening gun 33 and the second tightening gun 34 correspond to two diagonally located first mounting holes 63 respectively, and then the tightening assembly 2 is lowered to tighten the bolts, and then the tightening assembly 2 is rotated by the rotating member 14 so that the first tightening gun 33 and the second tightening gun 34 correspond to two diagonally located first mounting holes 63 respectively, and then the bolts on the other two first mounting holes 63 are tightened to complete the tightening of the bolts on the supporting wheel 62.

[0063] In other embodiments, the control system controls the movement of the tightening assembly 2 according to the established three-dimensional coordinate system, and the moving assembly adjusts the distance between the first tightening gun 33 and the second tightening gun 34 so that the first tightening gun 33 and the second tightening gun 34 respectively correspond to the first mounting holes 63 at both ends of the supporting wheel 62 and on the same side of the rectangle, and then the tightening assembly 2 is lowered to tighten the bolts, and the tightening assembly 2 is moved by the mechanical arm assembly 1 so that the first tightening gun 33 and the second tightening gun 34 respectively correspond to the other two first mounting holes 63, and then the bolts on the other two first mounting holes 63 are tightened to complete the tightening of the bolts on the supporting wheel 62.

[0064] In summary, the above embodiments provided by the present invention are only illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A bolt tightening device, used for tightening the bolts on the supporting wheel to connect the supporting wheel to the chassis of the excavator, characterized in that: The bolt tightening device comprises: a mechanical arm assembly, a tightening assembly and a control system; The mechanical arm assembly is used to move the tightening assembly; The tightening assembly includes: a tightening mechanism and a visual mechanism, the tightening mechanism includes: a fixing plate, a fixing column and a tightening gun, the tightening gun is arranged on the fixing plate, the fixing plate is connected to the fixing column, the visual mechanism is arranged on the fixing column, the visual mechanism is used to photograph the supporting roller, and the upper end of the fixing column is connected to the mechanical arm assembly; The control system is connected to the tightening mechanism, the visual mechanism and the mechanical arm assembly. The control system can control the mechanical arm assembly to move the tightening mechanism according to the image captured by the visual mechanism to tighten the bolt.

2. The bolt tightening device according to claim 1, characterized in that: The tightening gun comprises: a first tightening gun; The fixing plate is provided with a moving mechanism, and the moving mechanism is used for driving the first tightening gun to move.

3. The bolt tightening device according to claim 2, characterized in that: The moving mechanism comprises: a slide rail, a slider, an adjustment plate and a driving mechanism; The slide rail is arranged on the fixed plate, the slider is slidably arranged on the slide rail, the adjustment plate is fixed on the slider, the first tightening gun is arranged on the adjustment plate, an adjustment hole is opened on the fixed plate, and the adjustment hole is arranged corresponding to the moving position of the first tightening gun, the driving mechanism is arranged on the adjustment plate, and the driving mechanism is used to drive the slider to move on the slide rail.

4. The bolt tightening device according to claim 3, characterized in that: The driving mechanism comprises: a driving motor, a gear and a rack; The driving motor is arranged on the adjusting plate, the output end of the driving motor passes through the adjusting plate and is connected with the gear, the rack is arranged on the side of the fixing plate, and the rack is meshed with the gear.

5. The bolt tightening device according to claim 3, characterized in that: The fixing plate is provided with a limiting member; The limiting member is arranged corresponding to the sliding direction of the slider, and the limiting member is used to limit the moving range of the slider.

6. The bolt tightening device according to claim 2, characterized in that: The tightening gun further comprises: a second tightening gun, wherein the first tightening gun and the second tightening gun are respectively arranged on both sides of the fixing column; Both sides of the chassis are provided with mounting grooves, the supporting rollers are arranged on the mounting grooves, and the two ends of the supporting rollers are respectively arranged on the groove walls on both sides of the mounting grooves, and the two ends of the supporting rollers are provided with first mounting holes, and the distance between the first mounting holes at the two ends of the supporting rollers matches the distance between the first tightening gun and the second tightening gun, and the groove wall of the mounting groove is provided with second mounting holes, the second mounting holes are arranged corresponding to the first mounting holes, and the bolts are arranged on the first mounting holes.

7. The bolt tightening device according to claim 1, characterized in that: The visual mechanism comprises: a connecting plate, an adjusting column and a shooting device; The connecting plate is connected to the fixing column, one end of the adjusting column is connected to the connecting plate and the other end is connected to the photographing device, the adjusting column can adjust the length, and the photographing device is used to photograph the supporting wheel.

8. The bolt tightening device according to claim 1, characterized in that: The mechanical arm assembly comprises: a mechanical arm, a beam frame, a rotating part and a rotating part; The mechanical arm is arranged upside down, one end of the mechanical arm is fixed on the crossbeam frame, and the other end is connected to the rotating member, one end of the rotating member is connected to the rotating member, and the output end of the rotating member is connected to the fixed column.

9. The bolt tightening device according to claim 1, characterized in that: Also includes: Carrying assembly; The chassis is arranged on the material loading assembly, and the material loading assembly comprises: a material loading platform, universal wheels and a rotating mechanism; The universal wheel is arranged on the loading platform, the rotating mechanism is arranged on the loading platform, and one end of the rotating mechanism is connected to the chassis.

10. The bolt tightening device according to claim 9, characterized in that: The control system is connected to the material carrying assembly, and the control system is also suitable for controlling the material carrying assembly to move to the next work station after the tightening assembly tightens all the bolts on the supporting wheels.

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