Electric wheel bolt tightening device

Abstract

The application provides an electric wheel bolt tightening device, which is characterized in that the electric wheel bolt tightening device comprises an electric tightening gun, an input shaft, an output shaft, a sleeve and a driving cylinder, the electric tightening gun, the input shaft, the output shaft and the sleeve are sequentially connected, and the electric tightening gun and the rotary bearing are matched to sequentially output power to the sleeve to drive the sleeve to rotate and tighten the bolts on the electric wheel; the electric tightening gun can also accurately control the torque to tighten the bolts to the correct preset torque, thereby preventing the bolts from loosening or being too tight; the axial elastic movement capability of the output shaft enables the device to adapt to different tightening positions and angles, thereby improving the flexibility of the device; the driving cylinder drives the rotary shell to rotate and drives the counterforce arm to rotate, so that the device can offset the torque borne by the device when tightening the bolts, thereby avoiding damage to the device caused by the device bearing a large counterforce when the electric wheel bolt tightening device is installed; through the scheme, the automation of the electric wheel bolt tightening process can be realized, manual operation can be reduced, the labor intensity of workers can be reduced, the work cycle can be shortened, and the work efficiency can be improved.

Description

Technical Field

[0001] This invention relates to the field of maintenance technology for electric wheels of mining trucks, and more specifically, to an electric wheel bolt tightening device. Background Technology

[0002] Mining truck electric wheels operate continuously under high loads, causing varying degrees of wear and even damage to their internal components, necessitating regular maintenance. To ensure the orderly operation of mine work, the maintained electric wheels must be reinstalled on the mining truck as soon as possible.

[0003] The installation of electric wheels in the current technology is carried out manually, which involves tightening a large number of large bolts. However, the tightening torque of large bolts can reach thousands of Newton-meters. Manual tightening is labor-intensive and has a large workload, which seriously affects work efficiency. Summary of the Invention

[0004] This invention provides an electric wheel bolt tightening device to solve the problems of high workload, high labor intensity, and serious impact on work efficiency caused by manual bolt tightening in the prior art.

[0005] To address the aforementioned problems, this invention provides an electric wheel bolt tightening device, comprising a housing structure, a slewing bearing, an electric tightening gun, an input shaft, an output shaft, a sleeve, a rotating outer shell, a drive cylinder, and a reaction arm. The slewing bearing is mounted on the housing structure, and the electric tightening gun is mounted within the housing structure and cooperates with the slewing bearing. The electric tightening gun, input shaft, output shaft, and sleeve are connected in sequence to drive the sleeve to rotate. The sleeve is used to tighten the bolts of the electric wheel. The output shaft can move elastically axially relative to the input shaft. The rotating outer shell is mounted on the slewing bearing and is sleeved on the output shaft. The reaction arm is mounted on the rotating outer shell. The drive cylinder is mounted on the housing structure, and the telescopic end of the drive cylinder is movably connected to the rotating outer shell to drive the rotating outer shell and the reaction arm to rotate. The reaction arm is used to abut against the electric wheel.

[0006] Furthermore, the output shaft is inserted into the input shaft and connected via a spline. A guide post is provided inside the input shaft, and a spring in a compressed state is fitted on the guide post. The spring and the end of the output shaft inserted into the input shaft abut against each other. A limit step is provided inside the input shaft, and the limit step and the end of the output shaft inserted into the input shaft stop to prevent the output shaft and the input shaft from separating.

[0007] Furthermore, the sleeve is detachably connected to the output shaft via a pin, a needle roller bearing is provided between the output shaft and the rotating housing, and an oil-free bushing is provided between the input shaft and the rotating housing.

[0008] Furthermore, the reaction arm and the rotating housing are connected by a spline, and their relative positions are fixed by a lock nut.

[0009] Furthermore, the output end of the electric tightening gun is square, and the input shaft has a square hole, into which the output end of the electric tightening gun is inserted.

[0010] Furthermore, the electric wheel bolt tightening device also includes an image recognition unit, which is installed on the housing structure. The image recognition unit is used to capture and identify the position of the bolts installed on the electric wheel.

[0011] Furthermore, the image recognition unit includes a camera bracket, a fixing ring, a 3D camera, a 2D camera, and a light source. The camera bracket is mounted on the housing structure via multiple fixing rings, and the position of the fixing rings on the housing structure is adjustable. The 3D camera, the 2D camera, and the light source are all mounted on the camera bracket.

[0012] Furthermore, the electric wheel bolt tightening device also includes a cylinder moving bracket and a cylinder fixed bracket. The cylinder fixed bracket is installed on the housing structure, the cylinder moving bracket is installed on the rotating housing, the cylinder barrel of the driving cylinder is hinged to the cylinder fixed bracket, and the telescopic end of the driving cylinder is hinged to the cylinder moving bracket.

[0013] Furthermore, the housing structure includes a bearing mounting flange, a robot connection flange, and multiple guide shafts connecting the bearing mounting flange and the robot connection flange. The slewing bearing is mounted on the bearing mounting flange, the robot connection flange is used to connect to the robot's robotic arm, and the electric tightening gun is located in the area surrounded by the multiple guide shafts.

[0014] Furthermore, the electric wheel bolt tightening device also includes an air source fixing plate, which is installed on the housing structure. An adapter is provided on the air source fixing plate for connecting a compressed air source. The drive cylinder is connected to the adapter through a pipeline.

[0015] The present invention provides an electric wheel bolt tightening device, comprising a housing structure, a slewing bearing, an electric tightening gun, an input shaft, an output shaft, a sleeve, a rotating outer shell, a drive cylinder, and a reaction arm. The slewing bearing is installed in the housing structure, and the electric tightening gun is installed inside the housing structure and cooperates with the slewing bearing. The electric tightening gun, input shaft, output shaft, and sleeve are connected in sequence to drive the sleeve to rotate. The sleeve is used to tighten the bolts of the electric wheel. The output shaft can move elastically in the axial direction relative to the input shaft. The rotating outer shell is installed in the slewing bearing and is sleeved on the output shaft. The reaction arm is installed in the rotating outer shell. The drive cylinder is installed in the housing structure, and the telescopic end of the drive cylinder is movably connected to the rotating outer shell to drive the rotating outer shell and the reaction arm to rotate. The reaction arm is used to abut against the electric wheel.

[0016] In this solution, an electric tightening gun, input shaft, output shaft, and sleeve are connected sequentially. The electric tightening gun, in conjunction with a slewing bearing, outputs power sequentially to the sleeve, causing the sleeve to rotate and tighten the bolts on the electric wheel. The electric tightening gun can also precisely control the torque, tightening the bolts to the correct preset torque, preventing loosening or overtightening. Furthermore, the axial elastic movement capability of the output shaft allows the equipment to adapt to different tightening positions and angles, improving the flexibility of the device. The drive cylinder drives the rotating housing to rotate, which in turn drives the reaction arm, allowing the device to counteract the torque borne by the device during bolt tightening, preventing damage caused by excessive reaction force on the device with the electric wheel bolt tightening device. This solution automates the electric wheel bolt tightening process, reducing manual operation, lowering the labor intensity of workers, and also helps to shorten the work cycle and improve work efficiency. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0018] Figure 1 A schematic diagram of the structure of the electric wheel bolt tightening device provided in an embodiment of the present invention is shown;

[0019] Figure 2 A front view of the electric wheel bolt tightening device provided in an embodiment of the present invention is shown;

[0020] Figure 3 A side view of the electric wheel bolt tightening device provided in an embodiment of the present invention is shown;

[0021] Figure 4 A top cross-sectional view of the electric wheel bolt tightening device provided in an embodiment of the present invention is shown.

[0022] The above figures include the following reference numerals:

[0023] 1. Sleeve; 2. Output shaft;

[0024] 3. Reaction arm; 4. Locking nut;

[0025] 5. Rotate the outer casing; 6. Drive the cylinder;

[0026] 7. Cylinder moving bracket; 8. Slewing bearing;

[0027] 9. Camera bracket; 10. Cylinder mounting bracket;

[0028] 11. Bearing mounting flange; 12. Air source fixing plate;

[0029] 13. Retaining ring; 14. Robot connection flange;

[0030] 15. Electric tightening gun;

[0031] 16. 3D camera;

[0032] 17. 2D camera; 18. Light source;

[0033] 19. Adapter; 20. Needle roller bearing;

[0034] 21. Spring; 22. Guide post;

[0035] 23. Input shaft; 24. Oil-free bushing;

[0036] 25. Guide shaft. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0038] like Figures 1 to 4 As shown, an embodiment of the present invention provides an electric wheel bolt tightening device, characterized in that it includes a housing structure, a rotary bearing 8, an electric tightening gun 15, an input shaft 23, an output shaft 2, a sleeve 1, a rotating outer shell 5, a drive cylinder 6, and a reaction arm 3. The rotary bearing 8 is installed in the housing structure, the electric tightening gun 15 is installed in the housing structure and cooperates with the rotary bearing 8, the electric tightening gun 15, the input shaft 23, the output shaft 2, and the sleeve 1 are connected in sequence to drive the sleeve 1 to rotate. The sleeve 1 is used to tighten the bolts of the electric wheel. The output shaft 2 can move elastically in the axial direction relative to the input shaft 23. The rotating outer shell 5 is installed in the rotary bearing 8 and is sleeved on the output shaft 2. The reaction arm 3 is installed in the rotating outer shell 5. The drive cylinder 6 is installed in the housing structure, and the telescopic end of the drive cylinder 6 is movably connected to the rotating outer shell 5 to drive the rotating outer shell 5 and the reaction arm 3 to rotate. The reaction arm 3 is used to abut against the electric wheel.

[0039] In this embodiment, the electric tightening gun 15, input shaft 23, output shaft 2, and sleeve 1 are connected in sequence. The electric tightening gun 15, in cooperation with the rotary bearing 8, outputs power to the sleeve 1, causing the sleeve 1 to rotate and tighten the bolts on the electric wheel. The electric tightening gun 15 can also precisely control the torque, tightening the bolts to the correct preset torque and preventing the bolts from loosening or becoming too tight. Moreover, the axial elastic movement capability of the output shaft 2 allows the device to adapt to different tightening positions and angles, improving the flexibility of the electric wheel bolt tightening device. The drive cylinder 6 drives the rotating housing 5 to rotate, which in turn drives the reaction arm 3 to rotate. This allows the electric wheel bolt tightening device itself to counteract the torque borne by the device when tightening the bolts, preventing the device (e.g., a robot) from being subjected to excessive reaction force and causing damage, thus protecting the robot or other devices. This solution automates the electric wheel bolt tightening process, reduces manual operation, lowers the labor intensity of workers, and also helps to shorten the work cycle and improve work efficiency.

[0040] Furthermore, the output shaft 2 is inserted into the input shaft 23 and connected via a spline. A guide post 22 is provided inside the input shaft 23, and a spring 21 in a compressed state is sleeved on the guide post 22. The spring 21 abuts against the end of the output shaft 2 inserted into the input shaft 23. A limit step is provided inside the input shaft 23, and the limit step cooperates with the stop at the end of the output shaft 2 inserted into the input shaft 23 to prevent the output shaft 2 from separating from the input shaft 23.

[0041] In this embodiment, the splined connection between the output shaft 2 and the input shaft 23 ensures a more stable connection and reduces loosening caused by vibration or impact. A guide post 22 is installed inside the input shaft 23, and a spring 21 is fitted onto the guide post 22, allowing the output shaft 2 to move elastically axially relative to the input shaft 23. This allows the device to adapt to different tightening positions and angles, improving its flexibility. Furthermore, the spring 21 absorbs impact and vibration, reducing wear between the output shaft 2 and the input shaft 23 and extending their service life. In this embodiment, the limiting step and the stop at one end of the output shaft 2 effectively prevent the output shaft 2 and the input shaft 23 from disengaging, preventing equipment damage and safety accidents.

[0042] like Figure 2 and Figure 4 As shown, the sleeve 1 is detachably connected to the output shaft 2 via a pin. A needle roller bearing 20 is provided between the output shaft 2 and the rotating housing 5, and an oil-free bushing 24 is provided between the input shaft 23 and the rotating housing 5.

[0043] In this embodiment, the sleeve 1 is detachably connected to the output shaft 2 via a pin, and an O-ring is fitted at the connection to prevent the pin from falling off during use. This connection is convenient and the structure is simple. Furthermore, it allows for faster disassembly and assembly when maintenance or replacement of the sleeve 1 or output shaft 2 is required. The needle roller bearing 20 placed between the output shaft 2 and the rotating housing 5 reduces rotational friction and improves speed and stability. Compared to traditional ball bearings, the needle roller bearing 20 has a smaller size and higher load capacity, making it suitable for applications with large radial loads. Moreover, the needle roller bearing 20 has high transmission efficiency, improving the overall working efficiency of the device. In this embodiment, an oil-free bushing 24 is also placed between the input shaft 23 and the rotating housing 5 to prevent radial movement of the input shaft 23. In this solution, both the needle roller bearing 20 and the oil-free bushing 24 reduce direct contact between the shaft and the rotating housing 5, thereby reducing wear and extending service life.

[0044] like Figure 2 As shown, the reaction arm 3 and the rotating housing 5 are connected by a spline, and their relative positions are fixed by a locking nut 4.

[0045] In this embodiment, the reaction arm 3 and the rotating housing 5 are connected by a spline, which makes the connection between the reaction arm 3 and the rotating housing 5 more stable. In addition, the relative position of the two is fixed by the locking nut 4 to prevent vibration or impact caused by large torque during operation, and to ensure a stable connection between the reaction arm 3 and the rotating housing 5.

[0046] The output end of the electric tightening gun 15 is square, and the input shaft 23 has a square hole, into which the output end of the electric tightening gun 15 is inserted.

[0047] In this embodiment, the output end of the electric tightening gun 15 is square, and the corresponding input shaft 23 has a square hole. The two match, and during the connection process, the output end can easily find the correct position and align with the input shaft 23, thereby reducing installation errors and improving assembly accuracy. Moreover, compared with the traditional circular connection, the square connection method can transmit torque more effectively and reduce torque loss during transmission, thereby ensuring the accuracy of tightening torque.

[0048] Furthermore, the electric wheel bolt tightening device also includes an image recognition unit, which is installed on the housing structure. The image recognition unit is used to capture and identify the position of the bolts installed on the electric wheel.

[0049] In this embodiment, an image recognition unit is also installed. Through image recognition technology, the position of the bolt can be accurately detected, ensuring that the electric tightening gun 15 can be aligned with the bolt, reducing errors, shortening tightening time, and improving production efficiency.

[0050] like Figure 2 and Figure 3 As shown, the image recognition unit includes a camera bracket 9, a fixing ring 13, a 3D camera 16, a 2D camera 17, and a light source 18. The camera bracket 9 is mounted on the housing structure via multiple fixing rings 13. The position of the fixing rings 13 on the housing structure is adjustable. The 3D camera 16, the 2D camera 17, and the light source 18 are all mounted on the camera bracket 9.

[0051] In this embodiment, the camera bracket 9 is fixed to the housing structure by multiple fixing rings 13, and the position of the fixing rings 13 on the housing structure is adjustable. This design allows the camera bracket 9 to be flexibly adjusted to adapt to different electric wheel sizes and bolt positions. Furthermore, the 3D camera 16 provides stereoscopic vision for accurate identification of the bolt's spatial position, while the 2D camera 17 captures planar images to assist the 3D camera 16 in identification. Especially when the 3D vision system cannot clearly identify the bolt, the 2D image can provide additional information. The bolt position obtained from the image is sent to the host computer, and the electric tightening gun 15 begins the bolt identification process based on the bolt position in the image. The light source 18 helps to provide uniform and sufficient light under different working environments and lighting conditions, improving the accuracy of image recognition. By integrating the 3D camera 16, 2D camera 17, and light source 18 onto the camera bracket 9, space is saved and space utilization is improved.

[0052] like Figure 1 As shown, the electric wheel bolt tightening device also includes a cylinder moving bracket 7 and a cylinder fixing bracket 10. The cylinder fixing bracket 10 is installed on the housing structure, the cylinder moving bracket 7 is installed on the rotating housing 5, the cylinder barrel of the driving cylinder 6 is hinged to the cylinder fixing bracket 10, and the telescopic end of the driving cylinder 6 is hinged to the cylinder moving bracket 7.

[0053] In this embodiment, by setting up a cylinder moving bracket 7 and a cylinder fixing bracket 10, the cylinder moving bracket 7 is moved by driving the cylinder 6 to rotate the rotating housing 5, thereby driving the reaction arm 3 to rotate to offset the torque borne by the housing structure when tightening the bolt, which improves the flexibility and operability of the device, and bolt tightening operations can be performed even in space-constrained conditions.

[0054] Furthermore, the housing structure includes a bearing mounting flange 11, a robot connection flange 14, and a plurality of guide shafts 25 connected between the bearing mounting flange 11 and the robot connection flange 14. A slewing bearing 8 is mounted on the bearing mounting flange 11, the robot connection flange 14 is used to connect to the robot's robotic arm, and an electric tightening gun 15 is located in the area surrounded by the plurality of guide shafts 25.

[0055] In this embodiment, the bearing mounting flange 11 provides a stable support point for the installation of the slewing bearing 8, ensuring stability and reliability during the tightening process. The robot connecting flange 14 allows the electric wheel bolt tightening device to be easily and securely connected to the robot's robotic arm, enabling seamless integration of the electric wheel bolt tightening device with the robot. The guide shaft 25 is bolted to both ends of the bearing mounting flange 11 and the robot connecting flange, respectively, supporting and connecting the two flanges. Furthermore, the camera bracket 9 can be fixed to the guide shaft 25 using multiple retaining rings 13, the positions of which are adjustable. This design allows the camera bracket 9 to be flexibly adjusted to accommodate different electric wheel sizes and bolt positions.

[0056] The electric wheel bolt tightening device also includes an air source fixing plate 12, which is installed on the housing structure. An adapter 19 is provided on the air source fixing plate 12. The adapter 19 is used to connect to a compressed air source. The drive cylinder 6 is connected to the adapter 19 through a pipeline.

[0057] In this embodiment, the adapter 19 is directly mounted on the air source fixing plate 12, facilitating the connection between the drive cylinder 6 and the compressed air source, reducing complex pipeline layout and connections, and simplifying the air source access process. The integrated design of the air source fixing plate 12 and the adapter 19 reduces the space occupied and improves the space utilization efficiency of the overall structure. Moreover, the air source fixing plate 12 provides a stable support for the adapter 19, reducing the instability of the air source connection caused by vibration or impact, and ensuring the reliability of the air source supply.

[0058] The above description is merely an optional embodiment of this solution and is not intended to limit the solution. Various modifications and variations can be made to this solution by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this solution should be included within the scope of protection of this solution.

[0059] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0060] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as exemplary only and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0061] In the description of this solution, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the attached drawings. It is only for the convenience of describing this solution and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or component referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this solution. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0062] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0063] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this solution.

Claims

1. An electric wheel bolt tightening device, characterized in that, The device includes a housing structure, a slewing bearing (8), an electric tightening gun (15), an input shaft (23), an output shaft (2), a sleeve (1), a rotating outer shell (5), a drive cylinder (6), and a reaction arm (3). The slewing bearing (8) is installed in the housing structure, and the electric tightening gun (15) is installed inside the housing structure and cooperates with the slewing bearing (8). The electric tightening gun (15), the input shaft (23), the output shaft (2), and the sleeve (1) are connected in sequence to drive the sleeve (1) to rotate. The sleeve (1) is used for tightening. Tighten the bolts of the electric wheel, the output shaft (2) can move elastically in the axial direction relative to the input shaft (23), the rotating housing (5) is installed on the rotary bearing (8), and the rotating housing (5) is sleeved on the output shaft (2), the reaction arm (3) is installed on the rotating housing (5), the drive cylinder (6) is installed on the housing structure, the telescopic end of the drive cylinder (6) is movably connected to the rotating housing (5) to drive the rotating housing (5) and the reaction arm (3) to rotate, and the reaction arm (3) is used to abut against the electric wheel; The electric wheel bolt tightening device also includes a cylinder moving bracket (7) and a cylinder fixing bracket (10). The cylinder fixing bracket (10) is installed on the housing structure, and the cylinder moving bracket (7) is installed on the rotating housing (5). The cylinder barrel of the driving cylinder (6) is hinged to the cylinder fixing bracket (10), and the telescopic end of the driving cylinder (6) is hinged to the cylinder moving bracket (7).

2. The electric wheel bolt tightening device according to claim 1, characterized in that, The output shaft (2) is inserted into the input shaft (23) and connected by a spline. A guide post (22) is provided inside the input shaft (23). A spring (21) in a compressed state is sleeved on the guide post (22). The spring (21) and the end of the output shaft (2) inserted into the input shaft (23) abut against each other. A limit step is provided inside the input shaft (23). The limit step and the end of the output shaft (2) inserted into the input shaft (23) stop each other to prevent the output shaft (2) and the input shaft (23) from separating.

3. The electric wheel bolt tightening device according to claim 1, characterized in that, The sleeve (1) is detachably connected to the output shaft (2) by a pin. A needle roller bearing (20) is provided between the output shaft (2) and the rotating housing (5). An oil-free bushing (24) is provided between the input shaft (23) and the rotating housing (5).

4. The electric wheel bolt tightening device according to claim 1, characterized in that, The reaction arm (3) and the rotating housing (5) are connected by a spline and their relative positions are fixed by a locking nut (4).

5. The electric wheel bolt tightening device according to claim 1, characterized in that, The output end of the electric tightening gun (15) is square, and the input shaft (23) has a square hole. The output end of the electric tightening gun (15) is inserted into the square hole.

6. The electric wheel bolt tightening device according to claim 1, characterized in that, The electric wheel bolt tightening device also includes an image recognition unit installed on the housing structure. The image recognition unit is used to capture and identify the position of the bolts installed on the electric wheel.

7. The electric wheel bolt tightening device according to claim 6, characterized in that, The image recognition unit includes a camera bracket (9), a fixing ring (13), a 3D camera (16), a 2D camera (17), and a light source (18). The camera bracket (9) is mounted on the housing structure by multiple fixing rings (13). The position of the fixing rings (13) on the housing structure is adjustable. The 3D camera (16), the 2D camera (17), and the light source (18) are all mounted on the camera bracket (9).

8. The electric wheel bolt tightening device according to claim 1, characterized in that, The housing structure includes a bearing mounting flange (11), a robot connection flange (14), and a plurality of guide shafts (25) connected between the bearing mounting flange (11) and the robot connection flange (14). The slewing bearing (8) is mounted on the bearing mounting flange (11), the robot connection flange (14) is used to connect to the robot's robotic arm, and the electric tightening gun (15) is located in the area surrounded by the plurality of guide shafts (25).

9. The electric wheel bolt tightening device according to claim 1, characterized in that, The electric wheel bolt tightening device also includes an air source fixing plate (12), which is installed on the housing structure. An adapter (19) is provided on the air source fixing plate (12). The adapter (19) is used to connect to a compressed air source. The drive cylinder (6) is connected to the adapter (19) through a pipeline.

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