Electric wheel bolt tightening device

Abstract

According to the electric wheel bolt tightening device, 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 so as to drive the sleeve to rotate and tighten a bolt on an electric wheel. The electric tightening gun can accurately control the torque, the bolt is tightened to the correct preset torque, and the bolt is prevented from loosening or being too tight. And the axial elastic moving capacity of the output shaft enables the device to adapt to different tightening positions and angles, and the flexibility of the device is improved. The driving air cylinder drives the rotating shell to rotate so as to drive the counter-force arm to rotate, so that the device can counteract torque borne by the device during bolt tightening, and the situation that the device provided with the electric wheel bolt tightening device bears large counter-force and is damaged is avoided. By means of the scheme, automation of the electric wheel bolt tightening process can be achieved, manual operation is reduced, the labor intensity of workers is reduced, the working period is shortened, and the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of electric wheel maintenance of mining trucks, and in particular to an electric wheel bolt tightening device. Background Art

[0002] The electric wheels of mining trucks are constantly running under high load conditions, and the internal parts will be worn or even damaged to varying degrees, so they need to be regularly inspected and repaired. In order to ensure the orderly progress of work in the mine, the repaired electric wheels need to be installed back on the mining trucks in a short time.

[0003] The installation of the electric wheel in the prior art is carried out manually, wherein a large number of large-sized bolts need to be tightened. However, the tightening torque of the large-sized bolts is as high as thousands of Newton meters. Manual tightening is labor-intensive and has a high work intensity, which seriously affects work efficiency. Summary of the invention

[0004] The invention provides an electric wheel bolt tightening device to solve the problem in the prior art that manual bolt tightening has a large workload, high work intensity and serious impact on work efficiency.

[0005] In order to solve the above problems, the present invention provides an electric wheel bolt tightening device, including a shell structure, a slewing bearing, an electric tightening gun, an input shaft, an output shaft, a sleeve, a rotating shell, a driving cylinder and a reaction arm. The slewing bearing is installed on the shell structure, the electric tightening gun is installed in the shell structure and cooperates with the slewing bearing, the electric tightening gun, the input shaft, the output shaft and the 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 be elastically moved axially relative to the input shaft, the rotating shell is installed on the slewing bearing, and the rotating shell is sleeved on the output shaft, the reaction arm is installed on the rotating shell, the driving cylinder is installed on the shell structure, the telescopic end of the driving cylinder is movably connected to the rotating shell to drive the rotating shell and the reaction arm to rotate, and the reaction arm is used to abut against the electric wheel.

[0006] Furthermore, the output shaft is inserted into the input shaft and matched through a spline. A guide column is provided in the input shaft, and a spring in a compressed state is sleeved on the guide column. The spring and one end of the output shaft inserted into the input shaft abut against each other. A limiting step is provided in the input shaft, and the limiting step and one end of the output shaft inserted into the input shaft match with a stopper to prevent the output shaft and the input shaft from disengaging.

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

[0008] Furthermore, the reaction arm and the rotating housing are connected via a spline, and the relative positions of the two are fixed by a locking nut.

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

[0010] Furthermore, the electric wheel bolt tightening device also includes an image recognition unit installed on the shell structure, and the image recognition unit is used to capture and identify the position of the installation bolt 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 installed on the shell structure through multiple fixing rings. The position of the fixing ring on the shell structure is adjustable. The 3D camera, the 2D camera and the light source are all installed on the camera bracket.

[0012] Furthermore, the electric wheel bolt tightening device also includes a cylinder movable bracket and a cylinder fixed bracket, the cylinder fixed bracket is installed on the shell structure, the cylinder movable bracket is installed on the rotating shell, 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 movable bracket.

[0013] Furthermore, the shell structure includes a bearing mounting flange, a robot connecting flange and a plurality of guide shafts connected between the bearing mounting flange and the robot connecting flange, the slewing bearing is mounted on the bearing mounting flange, the robot connecting flange is used to connect to the robot's mechanical arm, and the electric tightening gun is located in the area surrounded by the plurality of guide shafts.

[0014] Furthermore, the electric wheel bolt tightening device also includes an air source fixing plate, which is installed on the shell structure. An adapter is provided on the air source fixing plate, and the adapter is used to connect the compressed air source. The driving cylinder is connected to the adapter through a pipeline.

[0015] By applying the technical solution of the present invention, an electric wheel bolt tightening device is provided, comprising a shell structure, a slewing bearing, an electric tightening gun, an input shaft, an output shaft, a sleeve, a rotating shell, a driving cylinder and a reaction arm. The slewing bearing is mounted on the shell structure, the electric tightening gun is mounted in the shell structure and cooperates with the slewing bearing, the electric tightening gun, the input shaft, the output shaft and the 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 be elastically moved axially relative to the input shaft, the rotating shell is mounted on the slewing bearing, and the rotating shell is sleeved on the output shaft, the reaction arm is mounted on the rotating shell, the driving cylinder is mounted on the shell structure, the telescopic end of the driving cylinder is movably connected to the rotating shell to drive the rotating shell and the reaction arm to rotate, and the reaction arm is used to abut against the electric wheel.

[0016] In this solution, the electric tightening gun, input shaft, output shaft, and sleeve are connected in sequence, and the electric tightening gun outputs power to the sleeve in sequence through cooperation with the slewing bearing, so as to drive the sleeve to rotate and tighten the bolts on the electric wheel. The electric tightening gun can also accurately control the torque and can tighten the bolts to the correct preset torque to prevent the bolts from loosening or over-tightening. Moreover, the axial elastic movement ability of the output shaft enables the equipment to adapt to different tightening positions and angles, thereby improving the flexibility of the device. The driving cylinder drives the reaction arm to rotate by driving the rotating outer shell to rotate, so that the device can offset the torque borne by the device when tightening the bolts, avoiding the device installed with the electric wheel bolt tightening device from being damaged by a large reaction force. Through this solution, the automation of the electric wheel bolt tightening process can be realized, manual operations can be reduced, the labor intensity of workers can be reduced, and it can also help shorten the work cycle and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a 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 of the present invention. In the drawings:

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

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

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

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

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

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

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

[0025] 5. Rotate the housing; 6. Drive the cylinder;

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

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

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

[0029] 13. Fixing ring; 14. Robot connecting 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 column;

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

[0036] 25. Guide shaft. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work 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 shell structure, a slewing bearing 8, an electric tightening gun 15, an input shaft 23, an output shaft 2, a sleeve 1, a rotating shell 5, a driving cylinder 6 and a reaction arm 3. The slewing bearing 8 is installed in the shell structure, the electric tightening gun 15 is installed in the shell 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 to tighten the bolts of the electric wheel, the output shaft 2 can be elastically moved in the axial direction relative to the input shaft 23, the rotating shell 5 is installed on the slewing bearing 8, and the rotating shell 5 is sleeved on the output shaft 2, the reaction arm 3 is installed on the rotating shell 5, the driving cylinder 6 is installed on the shell structure, the telescopic end of the driving cylinder 6 is movably connected to the rotating shell 5 to drive the rotating shell 5 and the reaction arm 3 to rotate, and the reaction arm 3 is used to abut against the electric wheel.

[0039] In this embodiment, the electric tightening gun 15, the input shaft 23, the output shaft 2, and the sleeve 1 are connected in sequence, and the electric tightening gun 15 outputs power to the sleeve 1 in sequence through the cooperation with the slewing bearing 8, so as to drive the sleeve 1 to rotate to tighten the bolts on the electric wheel. The electric tightening gun 15 can also accurately control the torque, and can tighten the bolts to the correct preset torque to prevent the bolts from loosening or over-tightening. Moreover, the axial elastic movement ability of the output shaft 2 enables the device to adapt to different tightening positions and angles, thereby improving the flexibility of the electric wheel bolt tightening device. The driving cylinder 6 drives the reaction arm 3 to rotate by driving the rotating housing 5 to rotate, so that the electric wheel bolt tightening device itself can offset the torque borne by the device when tightening the bolts, avoiding the device (such as a robot) installed with the electric wheel bolt tightening device from being damaged by a large reaction force, and can play a role in protecting the robot or other devices. Through this solution, 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, and it can also help to shorten the work cycle and improve work efficiency.

[0040] Furthermore, the output shaft 2 is inserted into the input shaft 23 and is splined. A guide column 22 is provided in the input shaft 23. A spring 21 in a compressed state is sleeved on the guide column 22. The spring 21 and one end of the output shaft 2 inserted into the input shaft 23 abut against each other. A limiting step is provided in the input shaft 23. The limiting step and one end of the output shaft 2 inserted into the input shaft 23 are stoppered to prevent the output shaft 2 and the input shaft 23 from being separated.

[0041] In this embodiment, the spline fit between the output shaft 2 and the input shaft 23 can make the connection between the output shaft 2 and the input shaft 23 more stable, reducing the loose connection caused by vibration or impact. A guide column 22 is set in the input shaft 23, and a spring 21 is sleeved on the guide column 22, so that the output shaft 2 can move elastically in the axial direction relative to the input shaft 23, so that the device can adapt to different tightening positions and angles, improving the flexibility of the device, and the spring 21 can also absorb shock and vibration, reduce the wear between the output shaft 2 and the input shaft 23, and extend the service life. In addition, in this embodiment, the limit step and the stopper at one end of the output shaft 2 can effectively prevent the output shaft 2 and the input shaft 23 from being separated, preventing equipment damage and safety accidents caused by this.

[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 bearing 20 is arranged between the output shaft 2 and the rotating housing 5, and an oil-free bushing 24 is arranged 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 through a pin, and an O-ring is sleeved at the connection to prevent the pin from falling off during use. The connection is convenient and the structure is simple. Moreover, when the sleeve 1 or the output shaft 2 needs to be repaired or replaced, it can be disassembled and assembled more quickly. A needle bearing 20 is arranged between the output shaft 2 and the rotating housing 5, which can reduce the rotational friction and improve the rotation speed and stability. Compared with the traditional ball bearing, the needle bearing 20 has a smaller volume and higher load capacity, which is suitable for occasions with large radial loads. In addition, the needle bearing 20 has high transmission efficiency, which can improve the working efficiency of the entire device. In this embodiment, an oil-free bushing 24 is also arranged between the input shaft 23 and the rotating housing 5 to prevent the input shaft 23 from moving radially. In this solution, both the needle bearing 20 and the oil-free bushing 24 can reduce the direct contact between the shaft and the rotating housing 5, thereby reducing wear and extending the service life.

[0044] like Figure 2 As shown, the reaction arm 3 and the rotating housing 5 are connected by a spline, and the relative positions of the two 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 can make the connection between the reaction arm 3 and the rotating housing 5 more stable, and the relative positions of the two are fixed by a locking nut 4 to prevent vibration or impact caused by large torque during operation, thereby ensuring 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, the input shaft 23 has a square hole, and the output end of the electric tightening gun 15 is inserted into the square hole.

[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 each other, 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 more effectively transmit torque and reduce the loss during torque transmission, thereby ensuring the accuracy of the tightening torque.

[0048] Furthermore, the electric wheel bolt tightening device also includes an image recognition unit installed on the shell structure, and the image recognition unit is used to capture and identify the position of the installation bolt 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 to ensure that the electric tightening gun 15 can be aligned with the bolt, reduce errors, shorten tightening time, and improve 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 installed on the shell structure through multiple fixing rings 13. The position of the fixing ring 13 on the shell structure is adjustable. The 3D camera 16, the 2D camera 17 and the light source 18 are all installed on the camera bracket 9.

[0051] In this embodiment, the camera bracket 9 is fixed to the shell structure by a plurality of fixing rings 13, and the position of the fixing rings 13 on the shell structure is adjustable. This design enables the camera bracket 9 to be flexibly adjusted to adapt to different electric wheel sizes and bolt positions. Moreover, the 3D camera 16 can provide stereoscopic vision and accurately identify the spatial position of the bolt. The 2D camera 17 can capture a plane image to assist the 3D camera 16 in identification. In particular, when the 3D vision system cannot clearly identify, the 2D image can provide additional information and send the bolt position obtained by taking a photo to the host computer. The electric tightening gun 15 starts the cap recognition work according to the bolt position on the picture. The setting of the light source 18 helps to provide uniform and sufficient light under different working environments and lighting conditions, which can improve the accuracy of image recognition. By integrating the 3D camera 16, the 2D camera 17 and the light source 18 on the camera bracket 9, space can be saved and space utilization can be improved.

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

[0053] In this embodiment, a cylinder movable bracket 7 and a cylinder fixed bracket 10 are provided, and the cylinder 6 is driven to extend and retract to drive the movement of the cylinder movable bracket 7 to rotate the rotating shell 5, thereby driving the reaction arm 3 to rotate to offset the torque borne by the shell structure when tightening the bolt, thereby improving the flexibility and operability of the device, and enabling bolt tightening operations to be performed even when space is limited.

[0054] Furthermore, the shell structure includes a bearing mounting flange 11, a robot connecting flange 14, and a plurality of guide shafts 25 connected between the bearing mounting flange 11 and the robot connecting flange 14. The slewing bearing 8 is mounted on the bearing mounting flange 11. The robot connecting flange 14 is used to connect to the robot's mechanical arm. The 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 conveniently and stably connected to the robot's mechanical arm, so that the electric wheel bolt tightening device can be seamlessly integrated with the robot. The two ends of the guide shaft 25 are respectively connected to the bearing mounting flange 11 and the robot connecting flange by bolts, so that the two flanges can be supported and connected. In addition, the camera bracket 9 can be fixed to the guide shaft 25 by multiple fixing rings 13, and the position of the fixing ring 13 on the guide shaft 25 is adjustable. This design allows the camera bracket 9 to be flexibly adjusted to adapt to different electric wheel sizes and bolt positions.

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

[0057] In this embodiment, the adapter 19 is directly arranged on the gas source fixing plate 12, which facilitates the connection between the driving cylinder 6 and the compressed gas source, reduces the complex pipeline layout and connection, and simplifies the gas source access process. The integrated design of the gas source fixing plate 12 and the adapter 19 can reduce the occupied space and improve the space utilization efficiency of the overall structure. In addition, the gas source fixing plate 12 can provide a stable support for the adapter 19, reduce the problem of unstable gas source connection caused by vibration or impact, and ensure the reliability of gas source supply.

[0058] The above is only an optional embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may be modified and varied in various ways. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0059] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0060] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of this solution. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being only exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0061] In the description of this scheme, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing this scheme and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the scope of protection of this scheme; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

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

[0063] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only to facilitate the distinction between corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this scheme.

Claims

1. An electric wheel bolt tightening device, characterized in that: The invention comprises 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 housing (5), a driving cylinder (6) and a reaction arm (3), wherein the slewing bearing (8) is mounted on the housing structure, the electric tightening gun (15) is mounted in 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, and the sleeve (1) is used to tighten The output shaft (2) is elastically movable in the axial direction relative to the input shaft (23); the rotating housing (5) is mounted on the slewing bearing (8), and the rotating housing (5) is sleeved on the output shaft (2); the reaction arm (3) is mounted on the rotating housing (5); the driving cylinder (6) is mounted on the housing structure; the telescopic end of the driving 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.

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 is splined. A guide column (22) is provided inside the input shaft (23). A spring (21) in a compressed state is sleeved on the guide column (22). The spring (21) and one end of the output shaft (2) inserted into the input shaft (23) are in abutment with each other. A limiting step is provided inside the input shaft (23). The limiting step and one end of the output shaft (2) inserted into the input shaft (23) are stoppered to prevent the output shaft (2) and the input shaft (23) from being separated.

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) via a pin, a needle 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).

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 via a spline, and the relative positions of the two are fixed via 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, and 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, and the image recognition unit is used to photograph and identify the position of the mounting bolts on the electric wheel.

7. The electric wheel bolt tightening device according to claim 6, characterized in that: The image recognition unit comprises 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 a plurality of 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 electric wheel bolt tightening device also includes a cylinder movable bracket (7) and a cylinder fixed bracket (10), wherein the cylinder fixed bracket (10) is mounted on the housing structure, the cylinder movable bracket (7) is mounted on the rotating housing (5), the cylinder barrel of the driving cylinder (6) is hinged to the cylinder fixed bracket (10), and the telescopic end of the driving cylinder (6) is hinged to the cylinder movable bracket (7).

9. The electric wheel bolt tightening device according to claim 1, characterized in that: The housing structure comprises a bearing mounting flange (11), a robot connecting flange (14), and a plurality of guide shafts (25) connected between the bearing mounting flange (11) and the robot connecting flange (14); the slewing bearing (8) is mounted on the bearing mounting flange (11); the robot connecting flange (14) is used to be connected to a robot arm; and the electric tightening gun (15) is located in an area surrounded by the plurality of guide shafts (25).

10. 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), the air source fixing plate (12) being mounted on the housing structure, an adapter (19) being provided on the air source fixing plate (12), the adapter (19) being used to connect to a compressed air source, and the driving cylinder (6) being connected to the adapter (19) via a pipeline.

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