Mobile device and welding robot

Abstract

The application relates to a mobile device and a welding robot, the mobile device comprising: a vehicle body; a clamping assembly arranged on the vehicle body, the clamping assembly being provided with a clamping groove penetrating in a first direction and used for accommodating a rib plate, the clamping assembly being capable of moving along the first direction relative to the rib plate when the vehicle body moves along the first direction, and a second direction being perpendicular to the first direction; and a connecting seat arranged on the vehicle body, the connecting seat being provided with a connecting part connected with a welding arm. Compared with an existing AGV mobile trolley or a magnetic adsorption trolley, the rib plate is clamped in the clamping groove, the vehicle body can pass through the rib plate, the vehicle body is more stable during movement, and the welding operation of the welding arm is also more stable.

Description

Technical Field

[0001] This application relates to the field of welding technology, and in particular to mobile devices and welding robots. Background Technology

[0002] Collaborative robots refer to robots that work in tandem with humans on a production line, fully leveraging the efficiency of the robots and the intelligence of humans. These robots are not only cost-effective but also safe and convenient, significantly improving work efficiency.

[0003] In related technologies, particularly in the field of bridge steel structures, welding is generally performed using collaborative robots. Existing collaborative robot mobility devices typically fall into two categories: First, AGV (Automated Guided Vehicle) mobile carts, which can move along a pre-defined path on a flat surface. Second, magnetically attached carts, which use magnetic force to stabilize the cart body and move on steel plates via rollers.

[0004] However, for steel structures with multiple intersecting ribs welded together, the aforementioned AGV mobile carts and magnetic adsorption carts are too large to move through the space formed by the intersecting ribs. Utility Model Content

[0005] Based on this, this application provides a mobile device and a welding robot to solve the problem that welding robots in related technologies cannot meet the usage requirements.

[0006] This application provides a mobile device, which includes: a vehicle body; a clamping assembly disposed on the vehicle body, the clamping assembly having a clamping groove disposed through the vehicle body in a first direction for accommodating a rib, wherein when the vehicle body moves in the first direction, the clamping assembly can move relative to the rib in the first direction, and a second direction is perpendicular to the first direction; and a connecting seat disposed on the vehicle body, the connecting seat having a connecting portion for connecting a welding arm.

[0007] In one embodiment, the clamping assembly includes an adjusting member and two clamping members, the two clamping members being spaced apart along a second direction, a clamping groove being disposed between the two clamping members, and the adjusting member being drivenly connected to the clamping members to move the clamping members along the second direction, the first direction and the second direction being perpendicular to each other.

[0008] In one embodiment, the clamping member includes clamping wheels, two clamping wheels are spaced apart along a second direction, a clamping groove is disposed between the two clamping wheels, and the clamping wheels are rotatably disposed about an axis extending along a third direction, the first direction, the second direction and the third direction being perpendicular to each other.

[0009] In one embodiment, the adjusting member includes an adjusting cylinder that extends in a second direction, the cylinder body of the adjusting cylinder being connected to the vehicle body, and the push rod of the adjusting cylinder being connected to a clamping wheel to move the clamping wheel in the second direction.

[0010] In one embodiment, the vehicle body includes a first upright plate, a second upright plate, and a connecting plate. The first upright plate and the second upright plate are spaced apart along a second direction, and the first direction and the second direction are perpendicular to each other. The connecting plate is connected between the first upright plate and the second upright plate. A connecting seat is disposed on the side of the connecting plate away from the first upright plate and the second upright plate. The first upright plate, the connecting plate, and the second upright plate together form a receiving cavity, and a clamping assembly is disposed in the receiving cavity.

[0011] In one embodiment, the mobile device further includes a drive motor, a reducer, and a roller. The reducer is disposed on the vehicle body, the drive motor is disposed on the reducer and drivenly connected to the reducer, and the reducer is drivenly connected to the roller so that the roller is rotatably disposed on the vehicle body about an axis extending in a second direction, wherein the first direction and the second direction are perpendicular to each other.

[0012] In one embodiment, the vehicle body is provided with a handle; and / or, the vehicle body is made of aluminum.

[0013] In one embodiment, the connector includes a connector plate disposed on the vehicle body, and the connector includes a plurality of connector holes extending along a third direction. The plurality of connector holes are spaced apart circumferentially along the connector plate, and the third direction is perpendicular to the first direction.

[0014] In one embodiment, the connecting seat further includes a limiting plate, which is rotatably disposed on the connecting plate about an axis extending in a third direction. The limiting plate is provided with a plurality of through holes, and the plurality of through holes and the plurality of connecting holes are provided in a one-to-one correspondence. The through holes include interconnected clearance holes and limiting holes. The size of the clearance hole is larger than the size of the limiting hole, and the clearance hole and the limiting hole can respectively correspond to the connecting holes.

[0015] In another aspect, this application provides a welding robot, which includes: a welding arm; and a moving device, wherein the welding arm is detachably connected to the moving device, and the moving device includes the moving device provided above.

[0016] By applying the technical solution of this application, a welding arm is connected to the connecting part of the vehicle body, and a moving device is placed on the rib plate to be welded. One of the rib plates is placed in the clamping groove formed by the clamping assembly. Since the clamping groove is arranged through the vehicle body along the first direction, by moving the vehicle body along the first direction, the clamping assembly can move relative to the rib plate along the first direction, allowing the vehicle body to move along the extension direction of the rib plate. During the movement of the vehicle body, welding operations can be performed using the welding arm. Compared with existing AGV mobile carts or magnetic adsorption carts, by clamping the rib plate in the clamping groove, not only can the vehicle body move along the extension direction of the rib plate, but the movement of the vehicle body is also more stable, and the welding operation of the welding arm is also more stable. Attached Figure Description

[0017] Figure 1 A schematic diagram of the structure of the mobile device provided in an embodiment of this application is shown.

[0018] Figure 2 A front view of the mobile device provided in an embodiment of this application is shown.

[0019] Figure 3 A cross-sectional view of a mobile device provided in an embodiment of this application is shown.

[0020] Figure 4 A schematic diagram of the connector provided in an embodiment of this application is shown.

[0021] Figure 5 A schematic diagram of the structure of the welding robot provided in an embodiment of this application is shown.

[0022] Explanation of reference numerals in the attached figures:

[0023] 10. Vehicle body; 11. First upright plate; 12. Second upright plate; 13. Connecting plate; 15. Handle; 16. Roller; 20. Clamping assembly; 21. Clamping groove; 22. Clamping wheel; 23. Adjusting component; 30. Connecting seat; 31. Connecting plate; 311. Connecting hole; 32. Limiting plate; 321. Clearance hole; 322. Limiting hole; 40. Drive motor; 50. Reducer; 70. Moving device; 80. Welding arm; 90. Rib plate. Detailed Implementation

[0024] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0025] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and 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, and therefore should not be construed as a limitation of this application.

[0026] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0028] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0029] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0030] See Figures 1 to 3 , Figure 5 , Figure 1 A schematic diagram of the structure of the mobile device provided in an embodiment of this application is shown. Figure 2 A front view of the mobile device provided in an embodiment of this application is shown. Figure 3A cross-sectional view of a mobile device provided in an embodiment of this application is shown. One embodiment of this application provides a mobile device 70, which includes a vehicle body 10, a clamping assembly 20, and a connecting seat 30. The clamping assembly 20 is disposed on the vehicle body 10 and has a clamping groove 21 extending along a first direction X for accommodating a rib 90. When the roller 16 rotates, the clamping assembly 20 can move relative to the rib 90 along the first direction X. The second direction Y is perpendicular to the first direction X. The connecting seat 30 is disposed on the vehicle body 10 and has a connecting portion for connecting a welding arm 80.

[0031] By applying the technical solution of this application, the welding arm 80 is connected to the connecting part of the vehicle body 10, and the moving device 70 is placed on the rib plate to be welded, so that the rib plate 90 is placed in the clamping groove 21 formed by the clamping assembly 20. Since the clamping groove 21 is arranged through the first direction X, by moving the vehicle body 10 along the first direction X, the clamping assembly 20 can move relative to the rib plate 90 along the first direction X, so that the vehicle body 10 can move along the extension direction of the rib plate 90, and welding operations can be performed using the welding arm 80 during the movement of the vehicle body 10. Compared with existing AGV mobile carts or magnetic adsorption carts, by clamping the rib plate 90 in the clamping groove 21, not only can the vehicle body 10 move along the extension direction of the rib plate 90, but the movement of the vehicle body 10 is also more stable, and the welding operation of the welding arm 80 is also more stable.

[0032] It should be noted that during the movement of the vehicle body 10, the clamping assembly 20 moves relative to the rib 90, and the clamping assembly 20 contacts and engages with the rib 90, enabling the vehicle body 10 to move along the extending direction of the rib 90. In some embodiments, the clamping assembly 20 and the rib 90 may contact each other through a sliding friction engagement. In some embodiments, the clamping assembly 20 and the rib 90 may contact each other through a rolling friction engagement.

[0033] The connecting seat 30 can take various forms as needed, as long as it can securely fix the welding arm 80 to the vehicle body 10. Similarly, the form of the connecting part is not limited.

[0034] Combination Figure 1 and Figure 3 As shown, the clamping assembly 20 includes an adjusting member 23 and two clamping members, which are spaced apart along the second direction Y. A clamping groove 21 is disposed between the two clamping members. The adjusting member 23 is drivenly connected to the clamping members to move the clamping members along the second direction Y. The first direction X and the second direction Y are perpendicular to each other. With the above design, the position of the clamping members in the second direction Y can be adjusted by the adjusting member 23, which can adapt to the orientation of the rib 90 and the changes in the sidewall shape of the rib 90, so that the clamping members can always maintain contact with the rib 90.

[0035] Combination Figure 3 As shown, the clamping member includes clamping wheels 22, two clamping wheels 22 are spaced apart along the second direction Y, and a clamping groove 21 is disposed between the two clamping wheels 22. The clamping wheels 22 are rotatably disposed about an axis extending along a third direction Z. The first direction X, the second direction Y, and the third direction Z are mutually perpendicular. With the above design, by providing the clamping groove 21 between the two clamping wheels 22, when the wheelset moves relative to the rib 90 along the first direction X, the rotation of the clamping wheels 22 can reduce the friction between the clamping wheels 22 and the rib 90 through rolling friction, allowing the clamping wheels 22 to move easily relative to the rib 90.

[0036] In some embodiments, the clamping assembly 20 includes multiple wheelsets, each wheelset including two clamping wheels 22. The multiple wheelsets are arranged in rows and columns, that is, multiple rows of wheelsets are arranged in the height direction of the rib 90 and multiple columns of wheelsets are arranged in the length direction of the rib 90. By cooperating with the rib 90, the multiple wheelsets can further guide the vehicle body 10, so that the vehicle body 10 can move accurately along the extension direction of the rib 90.

[0037] In other embodiments, the clamping component 20 can be configured as a protrusion that slides and rubs against the rib 90. By forming a sliding friction between the protrusion and the rib 90, and by using the adjusting member 23 to drive the protrusion to move along the second direction Y, the friction between the clamping component 20 and the rib 90 can be reduced, so that the clamping component 20 can move easily relative to the rib 90.

[0038] Of course, one of the two clamping components can be designed as a clamping wheel 22, and the other can be designed as a protrusion. Alternatively, both clamping components can be designed as protrusions.

[0039] In actual operation, each clamping wheel 22 can be adjusted in the second direction Y using an adjusting member 23. Alternatively, a transmission structure can be set between the two clamping wheels 22 in a wheel set, allowing an adjusting member 23 to move simultaneously in opposite directions along the second direction Y.

[0040] Furthermore, for ribs 90 of different thicknesses, the size of the clamping groove 21 can be adjusted in advance, that is, the distance between the two clamping wheels 22 can be adjusted, so that the rib 90 can smoothly enter the clamping groove 21.

[0041] The clamping wheel 22 can be made of materials such as polyurethane and rubber, and has the characteristics of being wear-resistant, quiet, non-slip, and not damaging the ground.

[0042] In some embodiments, the adjusting member 23 includes an adjusting cylinder that extends along the second direction Y. The cylinder body is connected to the vehicle body 10, and the push rod of the adjusting cylinder is connected to the clamping wheel 22 to move the clamping wheel 22 along the second direction Y. By using the adjusting cylinder to drive the clamping wheel 22 to move along the second direction Y, the position of the clamping wheel 22 in the second direction Y can be precisely adjusted.

[0043] In other embodiments, the adjusting member 23 can also be designed in other forms. For example, the adjusting member 23 can be set as an adjusting spring, which stores elastic potential energy and adjusts the position of the clamping wheel 22 by adjusting the length of the adjusting spring. As long as the position adjustment of the clamping wheel 22 in the second direction Y can be achieved, it is acceptable.

[0044] Combination Figure 1 As shown, the vehicle body 10 includes a first upright plate 11, a second upright plate 12, and a connecting plate 13. The first upright plate 11 and the second upright plate 12 are spaced apart along a second direction Y, and the connecting plate 13 connects the first upright plate 11 and the second upright plate 12. A connecting seat 30 is disposed on the side of the connecting plate 13 away from the first upright plate 11 and the second upright plate 12. Rollers 16 are disposed on the first upright plate 11 and the second upright plate 12. The first upright plate 11, the connecting plate 13, and the second upright plate 12 together form a receiving cavity, and a clamping assembly 20 is disposed in the receiving cavity. The vehicle body 10 with the above design has a simple structure and is easy to manufacture.

[0045] In some embodiments, each clamping wheel 22 is driven to move along the second direction Y by an adjusting cylinder. Adjusting cylinders are provided on both the first upright plate 11 and the second upright plate 12, and the adjusting cylinders are located in the receiving cavity, so that the vehicle body 10 can protect the adjusting cylinders, prevent external debris from damaging the adjusting cylinders, and the vehicle body 10 can protect the clamping wheels 22.

[0046] The aforementioned vehicle body 10 provides a dust-proof environment, making it suitable for use in welding scenarios.

[0047] Combination Figure 2 As shown, the mobile device 70 also includes a drive motor 40, a reducer 50, and a roller 16. The reducer 50 is mounted on the vehicle body 10, and the drive motor 40 is mounted on and driven by the reducer 50. The reducer 50 is driven by the roller 16, so that the roller 16 is rotatably mounted on the vehicle body about an axis extending in the second direction Y, with the first direction X and the second direction Y being perpendicular. With the above design, the drive motor 40 can transmit power to the reducer 50, and then the power is transmitted through the reducer 50 to the roller 16 to drive the roller 16 to roll.

[0048] In some embodiments, the drive motor 40 and the reducer 50 are disposed within the receiving cavity, and the vehicle body 10 provides protection for the drive motor 40 and the reducer 50.

[0049] In some embodiments, the roller 16 includes a driving wheel and a driven wheel, which are respectively disposed at both ends of the vehicle body 10 in the forward direction, and the reducer 50 is drivenly connected to the driving wheel.

[0050] Among them, the roller 16 can be made of polyurethane, rubber and other materials, which have the characteristics of wear resistance, quietness, non-slip and no damage to the ground.

[0051] Combination Figure 1 As shown, a handle 15 is provided on the vehicle body 10. The handle 15 facilitates the transfer of the mobile device 70 by the operator, making operation easier.

[0052] In some embodiments, the vehicle body 10 is made of aluminum. By using lightweight aluminum to make the vehicle body 10, the weight of the vehicle body 10 can be reduced, making it easier to move and transfer the mobile device 70.

[0053] Combination Figure 4 As shown, the connecting seat 30 includes a connecting plate 31, which is disposed on the vehicle body 10. The connecting part includes multiple connecting holes 311, which extend along a third direction Z. The multiple connecting holes 311 are spaced apart circumferentially along the connecting plate 31, and the third direction Z is perpendicular to the first direction X. By using the connecting plate 31 with connecting holes 311, the welding arm 80 is connected to the connecting plate 31, which is simple in structure and easy to operate.

[0054] The connecting hole 311 can be either a smooth hole or a threaded hole. A threaded hole allows for threaded engagement with the welding arm 80, facilitating assembly and disassembly. Alternatively, if the connecting hole 311 is a smooth hole, an additional limiting component can be provided. After the connecting post of the welding arm 80 is inserted into the smooth hole, the limiting component will restrict the connecting post of the welding arm 80, preventing the welding arm 80 from coming out of the smooth hole.

[0055] Combination Figure 4 As shown, Figure 4A schematic diagram of the connecting seat provided in an embodiment of this application is shown. The connecting seat 30 also includes a limiting plate 32, which is rotatably disposed on the connecting plate 31 about an axis extending in the third direction Z. The limiting plate 32 is provided with a plurality of through holes, and the plurality of through holes and the plurality of connecting holes 311 are respectively provided. The through holes include interconnected clearance holes 321 and limiting holes 322. The size of the clearance hole 321 is larger than the size of the limiting hole 322. The clearance hole 321 and the limiting hole 322 can respectively correspond to the connecting holes 311. Using the above design, rotating the limiting plate 32 causes the clearance hole 321 to be correspondingly set with the connecting hole 311. The connecting post of the welding arm 80 is inserted into the connecting hole 311 through the clearance hole 321. At this time, rotating the limiting plate 32 causes the limiting hole 322 to be correspondingly set with the connecting hole 311. Since the size of the limiting hole 322 is smaller than the size of the clearance hole 321, the connecting post can be limited in the connecting hole 311 by using the limiting hole 322, thereby realizing the connection between the welding arm 80 and the connecting plate 31.

[0056] The limiting plate 32 is equipped with an operating handle, which is used to rotate the limiting plate 32 relative to the connecting plate 31.

[0057] It should be noted that the connecting post of the welding arm 80 includes a post body and a connecting protrusion. The connecting protrusion is located at the end of the post body, and its outer diameter is larger than that of the post body. The connecting protrusion can pass through the clearance hole 321 and be inserted into the connecting hole 311. At the same time, the outer diameter of the connecting protrusion is larger than that of the limiting hole 322. After the limiting plate 32 rotates, the limiting hole 322 can prevent the connecting protrusion from falling out of the connecting hole 311.

[0058] The existing AGV mobile trolley 10 has a large body size and low welding precision, which cannot meet the welding requirements. However, the mobile device 70 of this application adopts a structure in which the connecting plate 31 and the limiting plate 32 cooperate to connect the welding arm 80 to the connecting plate 31, which has high alignment and connection precision. Even when repeatedly positioning, it can meet the precision requirements, thereby improving the welding precision.

[0059] Existing magnetic adsorption trolleys rely on magnetic adsorption, which can cause high-intensity magnetic forces during welding to affect the welding current, thus impacting weld quality. In contrast, the moving device 70 of this application uses clamping wheels 22 to hold the rib plate 90, improving welding precision.

[0060] The mobile device 70 of this application adopts a lightweight design, and the vehicle body 10 is made of aluminum to reduce the weight of the device. At the same time, weight-reducing holes can be designed on the connecting plate 31 and the limiting plate 32 to further reduce the weight.

[0061] Combination Figure 5 As shown, Figure 5A schematic diagram of the structure of the welding robot provided in an embodiment of this application is shown. Another embodiment of this application provides a welding robot including a welding arm 80 and a moving device 70. The welding arm 80 is detachably connected to the moving device 70, which includes the aforementioned moving device 70. Using the above-described welding robot, the rib plate 90 is placed in the clamping groove 21 formed by the clamping assembly 20. Since the clamping groove 21 extends along the first direction X, by moving the vehicle body 10 along the first direction X, the clamping assembly 20 can move relative to the rib plate 90 along the first direction X, allowing the vehicle body 10 to move along the extension direction of the rib plate 90. During the movement of the vehicle body 10, welding operations can be performed using the welding arm 80. Compared to existing AGV mobile vehicles or magnetic adsorption vehicles, by clamping the rib plate 90 in the clamping groove 21, not only can the vehicle body 10 pass through the rib plate 90, but the movement of the vehicle body 10 is also more stable, and the welding operation of the welding arm 80 is also more stable.

[0062] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A mobile device, characterized in that, The mobile device includes: Vehicle body; A clamping assembly is disposed on the vehicle body. The clamping assembly has a clamping groove that extends through the vehicle body in a first direction and is used to accommodate a rib. When the vehicle body moves in the first direction, the clamping assembly can move relative to the rib in the first direction. A connecting seat is disposed on the vehicle body, and the connecting seat has a connecting portion for connecting a welding arm.

2. The mobile device according to claim 1, characterized in that, The clamping assembly includes an adjusting member and two clamping members, which are spaced apart along a second direction. The clamping groove is disposed between the two clamping members. The adjusting member is driven to the clamping members to move the clamping members along the second direction, wherein the first direction and the second direction are perpendicular.

3. The mobile device according to claim 2, characterized in that, The clamping member includes clamping wheels, two clamping wheels are spaced apart along the second direction, and the clamping groove is disposed between the two clamping wheels. The clamping wheels are rotatably disposed about an axis extending along a third direction, and the first direction, the second direction and the third direction are mutually perpendicular.

4. The mobile device according to claim 3, characterized in that, The adjusting component includes an adjusting cylinder that extends along the second direction. The cylinder body of the adjusting cylinder is connected to the vehicle body, and the push rod of the adjusting cylinder is connected to the clamping wheel to move the clamping wheel along the second direction.

5. The mobile device according to claim 1, characterized in that, The vehicle body includes a first upright plate, a second upright plate, and a connecting plate. The first upright plate and the second upright plate are spaced apart along a second direction, and the first direction and the second direction are perpendicular. The connecting plate is connected between the first upright plate and the second upright plate. The connecting seat is disposed on the side of the connecting plate away from the first upright plate and the second upright plate. The first upright plate, the connecting plate, and the second upright plate together form a receiving cavity. The clamping assembly is disposed in the receiving cavity.

6. The mobile device according to any one of claims 1 to 5, characterized in that, The mobile device further includes a drive motor, a reducer, and rollers. The reducer is disposed on the vehicle body, the drive motor is disposed on the reducer and drivenly connected to the reducer, and the reducer is drivenly connected to the rollers so that the rollers are rotatably disposed on the vehicle body about an axis extending in a second direction, wherein the first direction and the second direction are perpendicular.

7. The mobile device according to any one of claims 1 to 5, characterized in that, The vehicle body is equipped with a handle; and / or, The vehicle body is made of aluminum.

8. The mobile device according to any one of claims 1 to 5, characterized in that, The connector includes a connector plate disposed on the vehicle body. The connector includes a plurality of connector holes extending along a third direction. The plurality of connector holes are spaced apart circumferentially along the connector plate. The third direction is perpendicular to the first direction.

9. The mobile device according to claim 8, characterized in that, The connecting seat further includes a limiting plate, which is rotatably disposed on the connecting plate about an axis extending along the third direction. The limiting plate is provided with a plurality of through holes, and the plurality of through holes and the plurality of connecting holes are provided in a one-to-one correspondence. The through holes include interconnected clearance holes and limiting holes. The size of the clearance hole is larger than the size of the limiting hole, and the clearance hole and the limiting hole can respectively correspond to the connecting holes.

10. A welding robot, characterized in that, The welding robot includes: Welding arm; A mobile device, wherein the welding arm is detachably connected to the mobile device, the mobile device comprising any one of claims 1 to 9.

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