A container conveying system and method

Abstract

The application discloses a kind of container conveying system and method, it is related to automobile production line technical field, the system includes: first conveying system includes first conveying device, locking device, by first conveying device to the container is conveyed, and by locking device the container is locked and is assembled workpiece on container, it is conveyed to turnover system;Turnover system includes third conveying device, positioning device and turnover device, by third conveying device to the container is conveyed, by positioning device the container is fixed, and by turnover device the container is overturned, after overturning is completed to the container will be conveyed to second conveying system;Second conveying system includes second conveying device, by second conveying device to the container is conveyed, container sling will according to the size of container hoist container to target position welding, the present application can solve the technical problems of low efficiency and safety hazards in prior art manual overturning conveying.

Description

Technical Field

[0001] This invention relates to the field of automobile production line technology, and specifically to a cargo box conveying system and method. Background Technology

[0002] With the continuous development of the global economy and civilization, automobiles, as a means of transportation for getting around, carrying people and transporting goods, are becoming increasingly popular. A cargo box is a loading container with a certain volume and sturdiness and durability, suitable for transshipment in various modes of transportation, and can be reused. A cargo box is generally composed of a bottom plate, side plates, and top plate. During the processing and assembly of a cargo box, a large amount of welding work is usually required.

[0003] During cargo box welding, in order to facilitate the welding of the floor and side panels and the assembly of bolts at the bottom of the floor, the cargo box welding line assembly fixtures generally flip the cargo box for positioning. After welding and assembly, the cargo box is flipped 180° and transferred by the cargo box lifting device. Currently, the flipping mechanism generally requires a dedicated person to operate it, lock the cargo box before flipping, unlock the cargo box after flipping, push the cargo box to turn and the trolley to return. Manual flipping and conveying is inefficient, and the operating position is close to the upper and lower positions of the cargo box lifting device, which poses a safety hazard.

[0004] Therefore, existing cargo container conveying systems generally suffer from low efficiency and safety hazards due to manual flipping and conveying. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide a cargo container conveying system and method, which aims to solve the technical problems of low efficiency and safety hazards of manual flipping and conveying in the prior art.

[0006] One aspect of the present invention is to provide a cargo container conveying system, the cargo container conveying system comprising:

[0007] A first transmission system, a second transmission system, and a flipping system disposed between the first transmission system and the second transmission system;

[0008] The first transmission system includes a first transmission device, a first sensing device, and a locking device, wherein the first sensing device and the locking device are respectively disposed on the first transmission device;

[0009] The flipping system includes a third conveying device, a third sensing device, a positioning device, and a flipping device. The third sensing device includes a front-end sensing component and a rear-end sensing component. The flipping device contains the third conveying device and the positioning device, and the third conveying device is equipped with the third sensing device.

[0010] The second transmission system includes a second transmission device and a second sensing device, wherein the second sensing device is disposed on the second transmission device;

[0011] The cargo box is conveyed by the first conveying device until the first sensing device detects that the cargo box has stopped conveying. The cargo box is then locked by the locking device, and workpieces are assembled on the cargo box. After assembly, the cargo box is conveyed to the third conveying device until the front sensing component detects that the cargo box has stopped conveying. The front sensing component and the rear sensing component identify the size of the cargo box, and the cargo box is fixed by the positioning device. The cargo box is then flipped by the flipping device. After flipping, the cargo box is conveyed to the second conveying device until the second sensing device detects that the cargo box has stopped conveying. The cargo box lifting device will then lift the cargo box to the target position for welding according to its size.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: The cargo box conveying system provided by the present invention improves the efficiency and safety of conveying. Specifically, the cargo box conveying system conveys and assembles workpieces through a first conveying system, and then identifies the size of the cargo box through a flipping system, making it suitable for conveying cargo boxes of different sizes, improving the versatility of the cargo box conveying system, making the cargo box conveying system more flexible, reducing costs, and greatly improving conveying efficiency. The flipping system flips the cargo boxes to facilitate subsequent welding of the cargo boxes, which is precise, efficient, and improves safety, avoiding the low efficiency of manual flipping and conveying and the safety hazards caused by manual operation. Finally, the second conveying system conveys the cargo boxes to the cargo box lifting position, and the cargo box lifting device lifts the cargo boxes to the target position for welding according to the size of the cargo boxes, realizing the automation of the cargo box conveying system, efficiently and accurately conveying cargo boxes, improving conveying efficiency, eliminating the need for manual flipping and cargo box transfer, reducing labor costs, and reducing the safety hazards caused by human operation, thereby solving the technical problems of low efficiency and safety hazards of manual flipping and conveying.

[0013] According to one aspect of the above technical solution, the first conveying device, the second conveying device, and the third conveying device all include two conveying supports. Each of the two conveying supports is equipped with a conveying motor and a conveying wheel. A connecting beam is provided between the two conveying supports. The output end of the conveying motor is connected to the conveying wheel. By driving the conveying motor to rotate, the conveying wheel is driven to roll and convey the cargo box.

[0014] According to one aspect of the above technical solution, the locking device is disposed on the connecting beam of the first conveying device. The locking device includes a locking cylinder and a locking member connected to the locking cylinder. The locking member is rotatably connected to the connecting beam. The first sensing device includes a first sensing component and a second sensing component respectively disposed on both sides of the first conveying device. The second sensing component is disposed on the side closer to the locking device. When the first sensing component senses the cargo box, it drives the first conveying device to convey the cargo box until the second sensing component senses that the cargo box has stopped conveying. Then, it controls the locking cylinder to retract, causing the locking member to rotate to abut against the cargo box and block the conveying of the cargo box.

[0015] According to one aspect of the above technical solution, the flipping device carries a conveying unit, which is used to carry and fix the cargo box. The flipping device is provided with a fourth conveying device, a fourth sensing device, and a first clamping device. The conveying unit is conveyed by the fourth conveying device until the fourth sensing device senses that the conveying unit has stopped conveying, and the first clamping device clamps the conveying unit. Then, the flipping device rotates and flips the conveying unit to the top of the flipping device. After the cargo box enters the flipping device, the conveying unit is used to fix the cargo box.

[0016] According to one aspect of the above technical solution, the first clamping device includes a first limiting block and a clamping assembly disposed on the fourth conveying device. The clamping assembly includes a first clamping cylinder and a first clamping arm and a second clamping arm connected to the first clamping cylinder. The first clamping arm and the second clamping arm are rotatably connected. When the fourth sensing device senses the conveying unit, the first limiting block and the first clamping arm abut against the conveying unit to restrict the movement of the conveying unit. Then, the first clamping cylinder is controlled to extend to drive the second clamping arm to rotate toward the first clamping arm until the second clamping arm abuts against the conveying unit to clamp the conveying unit.

[0017] According to one aspect of the above technical solution, the positioning device includes a first positioning component disposed on the connecting beam of the third conveying device, second positioning components respectively disposed at both ends of the third conveying device, and a third positioning component disposed on the conveying unit. The first positioning component includes a first positioning cylinder and a first positioning member connected to the first positioning cylinder. The first positioning member is rotatably connected to the connecting beam. Through the contraction movement of the first positioning cylinder, the first positioning member is driven to rotate to abut against the cargo box, blocking the conveying of the cargo box. The second positioning component includes a second positioning cylinder and a second positioning member connected to the second positioning cylinder. Through the extension movement of the second positioning cylinder, the second positioning member is driven to abut against both sides of the cargo box, restricting the circumferential movement of the cargo box. The third positioning component includes a third positioning cylinder and a positioning pin connected to the third positioning cylinder. Through the extension movement of the third positioning cylinder, the positioning pin is driven to insert into the positioning hole of the cargo box, restricting the lifting and lowering movement of the cargo box.

[0018] According to one aspect of the above technical solution, the front-end sensing component includes a first front-end sensing switch and a second front-end sensing switch. The first front-end sensing switch is disposed between the second front-end sensing switch and the rear-end sensing component. When the first front-end sensing switch senses the cargo box, the rear-end sensing component confirms whether the cargo box has been sensed in order to identify the size of the cargo box.

[0019] When the rear-end sensing component does not sense the cargo box, it determines that the size of the cargo box is the first size, stops the transmission, and controls the first positioning component to move against the cargo box.

[0020] When the rear-end sensing component senses the cargo box, it determines that the size of the cargo box is the second size, and continues to convey until the second front-end sensing switch senses the cargo box and stops conveying, and controls the first positioning component to move against the cargo box.

[0021] According to one aspect of the above technical solution, the two conveying supports of the second conveying device are respectively provided with second limiting blocks at the ends away from the flipping system. The conveying supports are connected to a second clamping device. The second clamping device includes a second clamping cylinder and a third clamping arm and a fourth clamping arm connected to the second clamping cylinder. The third clamping arm and the fourth clamping arm are rotatably connected. The conveying unit loaded with the cargo box is conveyed by the second conveying device until the second sensing device senses the cargo box. The second limiting block abuts against the conveying unit to restrict the movement of the conveying unit. Then, the second clamping cylinder is controlled to extend to drive the fourth clamping arm to rotate toward the third clamping arm until the fourth clamping arm abuts against the conveying unit to clamp the conveying unit. Then, the cargo box lifting device is controlled to lift the cargo box to the target position for welding.

[0022] According to one aspect of the above technical solution, the flipping device includes a flipping frame and a gear disposed on the flipping frame. By driving the rotation of the gear, the flipping frame is rotated so that the cargo box positioned inside the flipping device is flipped.

[0023] Another aspect of the present invention is to provide a cargo container conveying method, applied to the cargo container conveying system described in any one of the above technical solutions, the cargo container conveying method comprising:

[0024] The first conveying device conveys the cargo box until the first sensing device detects that the cargo box has stopped conveying. The locking device then locks the cargo box and assembles the workpiece on the cargo box. After assembly, the cargo box is conveyed to the third conveying device.

[0025] The cargo box is conveyed by the third conveying device until the front-end sensing component senses that the cargo box has stopped conveying. The size of the cargo box is identified by the front-end sensing component and the rear-end sensing component. The cargo box is fixed by the positioning device and flipped by the flipping device. After the flipping is completed, the cargo box is conveyed to the second conveying device.

[0026] The cargo box is conveyed by the second conveying device until the second sensing device detects that the cargo box has stopped conveying. The cargo box lifting device will then lift the cargo box to the target position for welding according to the size of the cargo box. Attached Figure Description

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0028] Figure 1 This is a schematic diagram of the structure of the first transmission system in the first embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the locking device in the first embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the flipping system in the first embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of the third conveying device in the first embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the structure of the fourth conveying device in the first embodiment of the present invention;

[0033] Figure 6 This is a schematic diagram of the clamping assembly in the first embodiment of the present invention;

[0034] Figure 7This is a schematic diagram of the structure of the second transmission system in the first embodiment of the present invention;

[0035] Figure 8 This is a schematic diagram of the conveying unit in the first embodiment of the present invention;

[0036] Figure 9 This is a flowchart of the cargo container conveying method in the first embodiment of the present invention;

[0037] Component symbol explanation in the attached diagram:

[0038] First conveying system 10, first conveying device 11, conveying support 110, conveying motor 111, conveying wheel 112, connecting beam 113, first sensing device 12, first sensing component 120, second sensing component 121, locking device 13, locking cylinder 130, locking piece 131, flipping system 20, flipping frame 21, third conveying device 22, fourth conveying device 25, positioning device 23, second positioning component 230, second positioning cylinder 2300, second positioning piece 2301, first positioning component 231, first positioning cylinder 2310, second positioning piece 2311, third positioning component 232, third sensing device 24, first front-end sensing switch 240 0, Second front-end induction switch 2401, rear-end induction component 241, start induction switch 242, fourth induction device 26, first clamping device 27, first limit block 271, clamping component 272, first clamping cylinder 2720, first clamping arm 2721, second clamping arm 2722, first fixing block 2723, second fixing block 2724, induction switch 2725, second conveying system 30, second conveying device 31, conveying unit 32, second limit block 33, second induction device 34, second clamping device 35, third positioning cylinder 2320, positioning pin 2321, positioning buffer cylinder 2322, positioning buffer block 2323, buffer groove block 320. Detailed Implementation

[0039] To make the objectives, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Several embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the present invention will be more thorough and complete.

[0040] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When 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. The terms "vertical," "horizontal," "left," "right," "upper," "lower," and similar expressions used herein are for illustrative purposes only and are not intended to 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 limiting the invention.

[0041] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. The term "and / or" as used herein includes any and all combinations of one or more of the related listed items.

[0042] Example 1

[0043] Please see Figures 1-8 The first embodiment of the present invention provides a cargo container conveying system, which includes: a first conveying system 10, a second conveying system 30, and a flipping system 20 disposed between the first conveying system 10 and the second conveying system 30.

[0044] The first conveying system 10 includes a first conveying device 11, a first sensing device 12, and a locking device 13. The first sensing device 12 and the locking device 13 are respectively mounted on the first conveying device 11. The first conveying device 11 conveys the cargo box until the first sensing device 12 senses that the cargo box has stopped conveying. The locking device 13 locks the cargo box and assembles the workpiece on the cargo box. After the assembly is completed, the cargo box is conveyed to the flipping system 20.

[0045] Specifically, the first conveying device 11 includes two conveying supports 110, each of which is equipped with a conveying motor 111 and a conveying wheel 112. A connecting beam 113 is provided between the two conveying supports 110. The output end of the conveying motor 111 is connected to the conveying wheel 112. By driving the conveying motor 111 to rotate, the conveying wheel 112 is driven to roll and convey the cargo box.

[0046] Furthermore, the locking device 13 is disposed on the connecting beam 113 of the first conveying device 11. The locking device 13 includes a locking cylinder 130 and a locking member 131 connected to the locking cylinder 130. The locking member 131 is in the shape of an inverted triangle and is rotatably connected to the connecting beam 113. When the locking cylinder 130 is driven to retract, the locking member 131 will be driven to rotate along the connecting beam 113. The locking member 131 moves toward the cargo box until it touches the cargo box. The locking member 131 is in the shape of an inverted triangle. When the locking cylinder 130 is driven to extend, the locking member 131 will be driven to rotate along the connecting beam 113. The locking member 131 moves away from the cargo box until it moves away from the cargo box. The locking member 131 moves to a V-shape.

[0047] Furthermore, the first sensing device 12 includes a first sensing component 120 and a second sensing component 121 respectively disposed on both sides of the first conveying device 11. The second sensing component 121 is disposed on the side closer to the locking device 13. When the first sensing component 120 senses the cargo box, it drives the first conveying device 11 to convey the cargo box until the second sensing component 121 senses that the cargo box has stopped conveying. Then, it controls the locking cylinder 130 to retract, causing the locking member 131 to rotate to abut against the cargo box, blocking the conveying of the cargo box. The first sensing device 12 and the second sensing device 34 can be sensors, which sense whether the cargo box is in position to facilitate subsequent conveying of the cargo box.

[0048] When the locking device locks the 13 cargo boxes, it will assemble the workpieces, which are bolts. After the workpieces are assembled, it will control the locking cylinder 130 to extend, driving the locking part 131 to rotate away from the cargo box, and continue to transport the cargo box to the flipping system 20.

[0049] Additionally, the flipping system 20 includes a third conveying device 22, a third sensing device 24, a positioning device 23, and a flipping device. The flipping device contains the third conveying device 22 and the positioning device 23. The third conveying device 22 is equipped with the third sensing device 24, which includes a front-end sensing component and a rear-end sensing component 241. The third conveying device 22 conveys the cargo box until the front-end sensing component senses the cargo box and stops conveying. The front-end sensing component and the rear-end sensing component 241 identify the size of the cargo box. The positioning device 23 fixes the cargo box, and the flipping device flips the cargo box. After the flipping is completed, the cargo box is conveyed to the second conveying system 30.

[0050] Specifically, the flipping device includes a flipping frame 21 and a gear mounted on the flipping frame 21. The rotation of the drive gear drives the flipping frame 21 to rotate, causing the cargo box positioned inside the flipping device to flip. The flipping frame 21 is cylindrical. The flipping device carries a conveying unit 32, which is used to carry and fix the cargo box. The flipping device is equipped with a fourth conveying device 25, a fourth sensing device 26, and a first clamping device 27. The fourth conveying device 25 conveys the conveying unit 32 until the fourth sensing device 26 senses that the conveying unit 32 has stopped conveying, and the first clamping device 27 clamps the conveying unit 32. Then, the flipping device rotates the conveying unit 32. When the cargo box enters the flipping device, the conveying unit 32 is used to fix the cargo box. The conveying unit can be a conveying trolley.

[0051] The fourth conveying device 25 includes two conveying supports, each equipped with a conveying motor and a conveying wheel. The output of the conveying motor is connected to the conveying wheel. By driving the conveying motor to rotate, the conveying wheel is driven to roll and convey the unit 32. The fourth sensing device 26 is connected to the conveying support 110 via a sensing bracket on the side away from the first clamping device 27. This fourth sensing device 26 can be a sensor, which senses whether the conveying unit 32 is in position, thereby improving the accuracy of the positioning of the conveying unit 32. In addition, the third conveying device 22 and the fourth conveying device 25 are located inside the flipping frame 21 and are arranged symmetrically within the flipping frame 21. Therefore, when the fourth conveying device 25 is aligned with the second conveying device 31, the conveying unit 32 conveys the goods from the second conveying device 31 to the fourth conveying device 25, flipping the flipping device 180°. The fourth conveying device 25 reaches the top of the flipping frame 21, and the third conveying device 22 will be aligned with the first conveying device 11 and the second conveying device 31. The cargo box enters the third conveying device 22, and the flipping device flips 180° again, flipping the cargo box to the top. The conveying unit 32 carries the cargo box, and the fourth conveying device 25 is aligned with the second conveying device 31. The conveying unit 32 carries the cargo box from the fourth conveying device 25 to the second conveying device 31 for subsequent conveying.

[0052] Furthermore, the first clamping device 27 includes a first limiting block 271 and a clamping assembly 272 disposed on the fourth conveying device 25. The first limiting block 271 is disposed on the conveying bracket 110 of the fourth conveying device 25. The clamping assembly 272 has the conveying bracket 110 disposed on the side away from the fourth sensing device 26. The clamping assembly 272 includes a first clamping cylinder 2720 and a first clamping arm 2721 and a second clamping arm 2722 connected to the first clamping cylinder 2720. The first clamping arm 2721 and the second clamping arm 2722 are rotatably connected. When the first clamping cylinder 2720 is driven to retract, the second clamping arm 2722 rotates away from the first clamping arm 2721 to release the conveying unit 32. When the first clamping cylinder 2720 is driven to extend, the second clamping arm 2722 rotates towards the first clamping arm 2721 to clamp the conveying unit 32. That is, when the fourth sensing device 26 senses the conveying unit 32, the first limiting block 271 and the first clamping arm 2721 abut against the conveying unit 32 to restrict the movement of the conveying unit 32, and then control the first clamping cylinder 2720 to extend, so as to drive the second clamping arm 2722 to rotate toward the first clamping arm 2721 until the second clamping arm 2722 abuts against the conveying unit 32 to clamp the conveying unit 32.

[0053] In addition, the first clamping arm 2721 is provided with a first fixing block 2723 on the side near the second clamping arm 2722, and the first fixing block 2723 is provided with a snap-fit ​​groove on the side near the second clamping arm 2722. The second clamping arm 2722 is provided with a second fixing block 2724 on the side near the first clamping arm 2721, and the second fixing block 2724 is provided with a snap-fit ​​block on the side near the first clamping arm 2721. Through the snap-fit ​​engagement of the snap-fit ​​groove and the snap-fit ​​block, the second clamping arm 2722 is fixed to the first clamping arm 2721, thereby restricting the movement of the first clamping arm 2721 and the second clamping arm 2722, increasing stability, and preventing the conveying unit 32 from falling off and being damaged due to movement of the first clamping arm 2721 or the second clamping arm 2722. At the same time, the snap-fit ​​engagement of the snap-fit ​​groove and the snap-fit ​​block will restrict the movement direction of the second clamping arm 2722. In addition, a sensor switch 2725 is provided on the first clamping arm 2721 to detect the status of the conveying unit 32 and clamp or release it.

[0054] After the conveying unit 32 is clamped in place, the conveying unit 32 is flipped to the top of the flipping device by the flipping device. The conveying unit 32 is located at the top of the flipping device to fix the cargo box and increase the stability of the cargo box flipping. After the flipping device flips the cargo box, the conveying unit 32 is used to carry the cargo box.

[0055] The third conveying device 22 includes two conveying supports, each equipped with a conveying motor and a conveying wheel. A connecting beam is provided between the two conveying supports. The output end of the conveying motor is connected to the conveying wheel. By driving the conveying motor to rotate, the conveying wheel is driven to roll and convey the cargo box.

[0056] Furthermore, the positioning device 23 includes a first positioning component 231 disposed on the connecting beam 113 of the third conveying device 22, a second positioning component 230 disposed at both ends of the third conveying device 22, and a third positioning component 232 disposed on the conveying unit 32. The first positioning component 231 includes a first positioning cylinder 2310 and a first positioning member connected to the first positioning cylinder 2310. The first positioning member is rotatably connected to the connecting beam 113. The first positioning member is in the shape of an inverted triangle. When the first positioning cylinder 2310 is driven to retract, it will drive the first positioning member to rotate along the connecting beam 113. The first positioning member moves toward the cargo box until it touches the cargo box. The first positioning member is in the shape of an inverted triangle. When the first positioning cylinder 2310 is driven to extend, it will drive the first positioning member to rotate along the connecting beam 113. The first positioning member moves away from the cargo box until it moves away from the cargo box. The first positioning member moves to a V-shape.

[0057] The second positioning component 230 is located at both ends of the conveying bracket 110 of the third conveying device 22. The second positioning component 230 includes a second positioning cylinder 2300 and a second positioning element 2301 connected to the second positioning cylinder 2300. When the second positioning cylinder 2300 is driven to retract, the second positioning element 2301 is driven to move away from the cargo box, releasing the cargo box. When the second positioning cylinder 2300 is driven to extend, the second positioning element 2301 is driven to move closer to the cargo box until it touches both sides of the cargo box. Several second positioning components 230 are provided at both ends of the conveying bracket 110. By positioning the cargo box with the second positioning components 230, the circumferential movement of the cargo box is restricted, and the stability of the cargo box positioning is increased. At the same time, the second positioning components 230 clamp the cargo box in the center to facilitate the subsequent fixation of the third positioning component 232 and prevent the positioning pin 2321 in the third positioning component 232 from directly impacting the cargo box and causing damage to the cargo box.

[0058] In addition, a third positioning component 232 is provided on the conveying unit 32. The third positioning component 232 includes a third positioning cylinder 2320 and a positioning pin 2321 connected to the third positioning cylinder 2320. Through the extension movement of the third positioning cylinder 2320, the positioning pin 2321 is driven to insert into the positioning hole of the cargo box, restricting the lifting and lowering movement of the cargo box. Furthermore, the conveying unit 32 is also provided with a positioning buffer component. This positioning buffer component includes a positioning buffer cylinder 2322 and a positioning buffer block 2323 connected to the positioning buffer cylinder 2322. When the third positioning component 232 receives a signal requiring positioning, it drives the positioning buffer cylinder 2322 to extend until the positioning buffer block 2323 abuts against and engages with the crossbeam of the cargo box, and then drives the third positioning cylinder 2320 to extend until the positioning pin 2321 is inserted into the positioning hole of the crossbeam of the cargo box. This positioning buffer component serves a buffering and positioning function, preventing damage to the cargo box caused by misalignment of the positioning pin 2321 during insertion. In addition, the conveying unit 32 is provided with several buffer grooves 320 to buffer the contact between the cargo box and the conveying unit 32, preventing the cargo box from being damaged by impact. The buffer grooves 320 are made of polyurethane material, which has a thermoplastic linear structure, excellent stability, chemical resistance, resilience and mechanical properties, and has less compression deformation.

[0059] The first positioning component 231, the second positioning component 230, and the third positioning component 232 are used to fix the cargo box inside the tilting device, increasing stability and preventing it from falling off and being damaged during tilting.

[0060] The third sensing device 24 includes a front-end sensing component and a rear-end sensing component 241. The front-end sensing component includes a first front-end sensing switch 2400 and a first front-end sensing switch 2401. The first front-end sensing switch 2400 is located between the first front-end sensing switch 2401 and the rear-end sensing component 241. When the first front-end sensing switch 2400 senses the cargo box, the rear-end sensing component 241 confirms whether the cargo box has been sensed in order to identify the size of the cargo box.

[0061] When the rear sensing component 241 does not sense the cargo box, it determines that the size of the cargo box is the first size, stops the transmission, and controls the first positioning component 231 to abut against the cargo box.

[0062] When the rear sensing component 241 senses the cargo box, it determines that the size of the cargo box is the second size, and continues to convey until the first front sensing switch 2401 senses the cargo box and stops conveying, and controls the first positioning component 231 to abut against the cargo box.

[0063] By positioning cargo boxes of different sizes in different locations, the second positioning component 230 can be centered and clamped, increasing stability. Furthermore, positioning them in different locations facilitates the alignment of the third positioning pin 2321 with the positioning hole in the cargo box. In this embodiment, the cargo boxes are divided into two sizes: the first size is a standard-axis cargo box, and the second size is a long-axis cargo box. In addition, the cargo box conveying system can transport cargo boxes of different sizes and, by identifying different sizes, hoist the cargo boxes to the target position, improving the versatility of the cargo box conveying system and making it more flexible. Furthermore, the second sensing device 34 also includes a start-up induction switch 242 located on the third conveying device 22. When the start-up induction switch 242 senses a cargo box, it controls the drive motor to rotate, starting the conveyor wheel 112 to convey the cargo box.

[0064] The second conveying system 30 includes a second conveying device 31 and a second sensing device 34. The second conveying device 31 conveys the cargo box until the second sensing device 34 senses that the cargo box has stopped conveying. The cargo box lifting device will then lift the cargo box to the target position for welding according to the size of the cargo box.

[0065] Specifically, the second conveying device 31 includes two conveying supports 110, each with a conveying motor 111 and a conveying wheel 112. The output end of the conveying motor 111 is connected to the conveying wheel 112. By driving the conveying motor 111 to rotate, the conveying wheel 112 is driven to roll and convey the conveying unit 32. The two conveying supports 110 of the second conveying device 31 are respectively provided with second limiting blocks 33 at the ends away from the flipping system 20. The conveying support 110 is connected to a second clamping device 35. The second clamping device 35 includes a second clamping cylinder and a third clamping arm and a fourth clamping arm connected to the second clamping cylinder. The third clamping arm and the fourth clamping arm are rotatably connected. The conveying unit 32 loaded with the cargo box is conveyed by the second conveying device 31 until the second sensing device 34 senses the cargo box. The second limiting block 33 abuts against the conveying unit 32 to restrict the movement of the conveying unit 32. Then, the second clamping cylinder is controlled to extend to drive the fourth clamping arm to rotate toward the third clamping arm until the fourth clamping arm abuts against the conveying unit 32 to clamp the conveying unit 32. Then, the cargo box lifting device is controlled to lift the cargo box to the target position for welding.

[0066] It should be noted that by designing an automated cargo conveying system, cargo boxes can be transported efficiently and accurately, improving conveying efficiency. There is no need for manual flipping and cargo box transfer, which reduces labor costs and safety hazards caused by manual operation.

[0067] Compared to existing technologies, the cargo box conveying system provided in this embodiment has the following advantages: It improves conveying efficiency and safety. Specifically, the system uses a first conveying system to transport and assemble workpieces, followed by a flipping system to identify the dimensions of the cargo boxes. This makes it suitable for conveying cargo boxes of different sizes, increasing the system's versatility and flexibility, reducing costs, and significantly improving conveying efficiency. The flipping system also flips the cargo boxes to facilitate subsequent welding, ensuring precision, efficiency, and safety. This avoids the low efficiency and safety hazards associated with manual flipping and conveying. Finally, a second conveying system transports the cargo boxes to a lifting device, which then lifts them to the target location for welding according to their dimensions. This automates the process, ensuring efficient and accurate cargo box transport, improving conveying efficiency, eliminating the need for manual flipping and cargo box transfer, reducing labor costs, and minimizing safety hazards caused by manual operation. This solves the common technical problems of low efficiency and safety hazards associated with manual flipping and conveying.

[0068] Example 2

[0069] Please see Figure 9 The image shows a cargo container conveying method provided in the second embodiment of the present invention, the method comprising steps S10-S12:

[0070] Step S10: The cargo box is conveyed by the first conveying device until the first sensing device senses that the cargo box has stopped conveying. The cargo box is then locked by the locking device and the workpiece is assembled on the cargo box. After the assembly is completed, the cargo box is conveyed to the third conveying device.

[0071] The first conveying device includes two conveying supports, each equipped with a conveying motor and a conveying wheel. A connecting beam is provided between the two conveying supports. The output end of the conveying motor is connected to the conveying wheel. By driving the conveying motor to rotate, the conveying wheel is driven to roll and convey the cargo box.

[0072] Furthermore, the locking device is located on the connecting beam of the first conveying device. The locking device includes a locking cylinder and a locking member connected to the locking cylinder. The locking member is in the shape of an inverted triangle and is rotatably connected to the connecting beam. When the locking cylinder is driven to retract, it will cause the locking member to rotate along the connecting beam. The locking member moves toward the cargo box until it touches the cargo box. The locking member is in the shape of an inverted triangle. When the locking cylinder is driven to extend, it will cause the locking member to rotate along the connecting beam. The locking member moves away from the cargo box until it moves away from the cargo box. The locking member moves to a V-shape.

[0073] Furthermore, the first sensing device includes a first sensing component and a second sensing component respectively disposed on both sides of the first conveying device. The second sensing component is disposed on the side closer to the locking device. When the first sensing component senses the cargo box, it drives the first conveying device to convey the cargo box until the second sensing component senses that the cargo box has stopped conveying. Then, it controls the locking cylinder to retract, causing the locking component to rotate to abut against the cargo box and block the conveying of the cargo box.

[0074] Once the locking device locks the cargo box, the workpiece will be assembled into the cargo box. After the workpiece is assembled, the locking cylinder will be controlled to extend, causing the locking device to rotate away from the cargo box, and the cargo box will continue to be conveyed to the tilting system.

[0075] Step S11: The cargo box is conveyed by the third conveying device until the front-end sensing component senses that the cargo box has stopped conveying. The size of the cargo box is identified by the front-end sensing component and the rear-end sensing component. The cargo box is fixed by the positioning device and flipped by the flipping device. After the flipping is completed, the cargo box is conveyed to the second conveying device.

[0076] The flipping device includes a flipping frame and gears mounted on the flipping frame. The rotation of the drive gears causes the flipping frame to rotate, thereby flipping the cargo box positioned inside the flipping device. The flipping frame is cylindrical. The flipping device carries a conveying unit, which is used to carry and fix the cargo box. The flipping device is equipped with a fourth conveying device, a fourth sensing device, and a first clamping device. The fourth conveying device conveys the conveying unit until the fourth sensing device senses that the conveying unit has stopped conveying. The first clamping device then clamps the conveying unit, and the flipping device rotates the conveying unit. When the cargo box enters the flipping device, the conveying unit is used to fix the cargo box.

[0077] The fourth conveying device includes two conveying supports, each equipped with a conveying motor and a conveying wheel. The output of the conveying motor is connected to the conveying wheel. By driving the conveying motor to rotate, the conveying wheel rotates and conveys the unit. A fourth sensing device is connected to the conveying support on the side away from the first clamping device via a sensing bracket. This fourth sensing device can be a sensor to detect whether the conveying unit is in position, improving the accuracy of the conveying unit's positioning. Furthermore, the third and fourth conveying devices are located within a tilting frame, arranged symmetrically within the frame. Therefore, when the fourth conveying device is aligned with the second conveying device, the conveying unit is conveyed from the second conveying device to the fourth conveying device. The tilting device then rotates 180°, and the fourth conveying device reaches the top of the tilting frame. The third conveying device will then be aligned with both the first and second conveying devices, allowing the cargo box to enter. The tilting device then rotates another 180°, tilting the cargo box to the top. The conveying unit, carrying the cargo box, then moves from the fourth conveying device to the second conveying device for further conveying, aligning with the second conveying device.

[0078] Furthermore, the first clamping device includes a first limiting block and a clamping assembly disposed on the fourth conveying device. The first limiting block is disposed on the conveying bracket of the fourth conveying device, and the clamping assembly has the conveying bracket disposed on the side away from the fourth sensing device. The clamping assembly includes a first clamping cylinder and a first clamping arm and a second clamping arm connected to the first clamping cylinder. The first clamping arm and the second clamping arm are rotatably connected. When the first clamping cylinder is driven to retract, the second clamping arm rotates away from the first clamping arm to release the conveying unit. When the first clamping cylinder is driven to extend, the second clamping arm rotates towards the first clamping arm to clamp the conveying unit. That is, when the fourth sensing device senses the conveying unit, the first limiting block and the first clamping arm abut against the conveying unit to restrict the movement of the conveying unit. Then, the first clamping cylinder is controlled to extend to drive the second clamping arm to rotate towards the first clamping arm until the second clamping arm abuts against the conveying unit to clamp the conveying unit.

[0079] In addition, the first clamping arm has a first fixing block on the side near the second clamping arm, and the first fixing block has a snap-fit ​​groove on the side near the second clamping arm. The second clamping arm has a second fixing block on the side near the first clamping arm, and the second fixing block has a snap-fit ​​block on the side near the first clamping arm. Through the snap-fit ​​engagement of the snap-fit ​​groove and the snap-fit ​​block, the second clamping arm is fixed to the first clamping arm, thereby restricting the movement of the first and second clamping arms, increasing stability, and preventing the conveying unit from falling off and being damaged due to movement of either the first or second clamping arm. At the same time, the snap-fit ​​engagement of the snap-fit ​​groove and the snap-fit ​​block restricts the direction of movement of the second clamping arm. In addition, the first clamping arm is equipped with a sensor switch to detect the status of the conveying unit and clamp or release it accordingly.

[0080] After the conveying unit is clamped in place, it is flipped to the top of the flipping device. The conveying unit is located at the top of the flipping device to fix the cargo box and increase the stability of the cargo box flipping. After the flipping device flips the cargo box, the conveying unit is used to carry the cargo box.

[0081] The third conveying device includes two conveying supports, each equipped with a conveying motor and a conveying wheel. A connecting beam is provided between the two conveying supports. The output end of the conveying motor is connected to the conveying wheel. By driving the conveying motor to rotate, the conveying wheel is driven to roll and convey the cargo box.

[0082] Furthermore, the positioning device includes a first positioning component disposed on the connecting beam of the third conveying device, second positioning components disposed at both ends of the third conveying device, and a third positioning component disposed on the conveying unit. The first positioning component includes a first positioning cylinder and a first positioning member connected to the first positioning cylinder. The first positioning member is rotatably connected to the connecting beam and is in the shape of an inverted triangle. When the first positioning cylinder is driven to retract, it will drive the first positioning member to rotate along the connecting beam. The first positioning member moves toward the cargo box until it abuts against the cargo box. The first positioning member is in the shape of an inverted triangle. When the first positioning cylinder is driven to extend, it will drive the first positioning member to rotate along the connecting beam. The first positioning member moves away from the cargo box until it moves away from the cargo box. The first positioning member moves to form a V-shape.

[0083] The second positioning components are located at both ends of the conveying bracket of the third conveying device. The second positioning components include a second positioning cylinder and a second positioning element connected to the second positioning cylinder. When the second positioning cylinder is driven to retract, it moves the second positioning element away from the cargo box, releasing the cargo box. When the second positioning cylinder is driven to extend, it moves the second positioning element closer to the cargo box until it touches both sides of the cargo box. Several second positioning components are provided at both ends of the conveying bracket. By positioning the cargo box with the second positioning components, the circumferential movement of the cargo box is restricted, increasing the stability of the cargo box positioning. At the same time, the second positioning components clamp the cargo box in the center to facilitate the fixation of the subsequent third positioning components and prevent the positioning pins in the third positioning components from directly impacting the cargo box and causing damage to the cargo box.

[0084] In addition, a third positioning component is located on the conveying unit. This component includes a third positioning cylinder and a positioning pin connected to it. The extension of the third positioning cylinder causes the positioning pin to insert into the positioning hole of the cargo box, restricting its lifting and lowering movement. Furthermore, the conveying unit also features a positioning buffer component, which includes a positioning buffer cylinder and a positioning buffer block connected to it. When the third positioning component receives a positioning signal, it drives the positioning buffer cylinder to extend until the positioning buffer block abuts against and engages with the crossbeam of the cargo box. The third positioning cylinder then extends until the positioning pin is inserted into the positioning hole of the crossbeam. This positioning buffer component serves both buffering and positioning functions, preventing damage to the cargo box caused by misalignment during positioning. Additionally, the conveying unit has several buffer grooves to cushion the contact between the cargo box and the conveying unit, preventing impact damage. These buffer grooves are made of polyurethane, a thermoplastic linear structure with excellent stability, chemical resistance, resilience, and mechanical properties, exhibiting minimal compression deformation.

[0085] The first positioning component, the second positioning component, and the third positioning component secure the cargo box within the tipping device, increasing stability and preventing it from falling off and being damaged during tipping.

[0086] The third sensing device includes a front-end sensing component and a rear-end sensing component. The front-end sensing component includes a first front-end sensing switch and a second front-end sensing switch. The first front-end sensing switch is located between the second front-end sensing switch and the rear-end sensing component. When the first front-end sensing switch senses the cargo box, the rear-end sensing component confirms whether the cargo box has been sensed in order to identify the size of the cargo box.

[0087] When the back-end sensing component does not sense the cargo box, it determines that the size of the cargo box is the first size, stops the transmission, and controls the first positioning component to move against the cargo box.

[0088] When the rear-end sensing component detects the cargo box, it determines that the cargo box size is the second size and continues to convey until the second front-end sensing switch detects the cargo box and stops conveying, then controls the first positioning component to abut against the cargo box.

[0089] By positioning cargo boxes of different sizes in different locations, the second positioning component can be centered and clamped, increasing stability. Furthermore, positioning them in different locations facilitates the alignment of the third positioning pin with the positioning holes in the cargo box. In this embodiment, the cargo boxes are divided into two sizes: a standard-axle cargo box and a long-axle cargo box. In addition, the cargo box conveying system can transport cargo boxes of different sizes and, by identifying their different sizes, hoist them to the target position, improving the versatility of the cargo box conveying system and making it more flexible.

[0090] In step S12, the cargo box is conveyed by the second conveying device until the second sensing device detects that the cargo box has stopped conveying. The cargo box lifting device will then lift the cargo box to the target position for welding according to the size of the cargo box.

[0091] Specifically, the second conveying device includes two conveying supports, each equipped with a conveying motor and a conveying wheel. The output end of the conveying motor is connected to the conveying wheel, and the conveying motor is driven to rotate, thereby causing the conveying wheel to roll and convey the conveying unit. At the end of each of the two conveying supports away from the tilting system, a second limiting block is provided. The conveying supports are connected to a second clamping device, which includes a second clamping cylinder and a third and fourth clamping arms connected to the second clamping cylinder. The third and fourth clamping arms are rotatably connected. The second conveying device conveys the conveying unit loaded with the cargo box until the second sensing device detects the cargo box. The second limiting block abuts against the conveying unit, restricting its movement. Then, the second clamping cylinder is controlled to extend, causing the fourth clamping arm to rotate toward the third clamping arm until it abuts against the conveying unit, clamping it. Finally, the cargo box lifting device is controlled to lift the cargo box to the target position for welding.

[0092] It should be noted that by designing an automated cargo conveying system, cargo boxes can be transported efficiently and accurately, improving conveying efficiency. There is no need for manual flipping and cargo box transfer, which reduces labor costs and safety hazards caused by manual operation.

[0093] Compared to existing technologies, the cargo box conveying method provided in this embodiment has the following advantages: It improves the efficiency and safety of conveying. Specifically, the method includes conveying the cargo box via a first conveying device until a first sensing device detects that the conveying has stopped. A locking device then locks the cargo box and assembles a workpiece onto it. After assembly, the cargo box is conveyed to a third conveying device, which continues conveying it until a front-end sensing component detects that the conveying has stopped. The front and rear sensing components identify the size of the cargo box, making it suitable for conveying cargo boxes of different sizes, thus improving the versatility of the conveying process and making it more flexible. A positioning device is also included. The cargo box is fixed in place and then flipped by a flipping device. After flipping, the cargo box is transferred to a second conveying device, which greatly improves the conveying efficiency, precision, and safety. It avoids the low efficiency and safety hazards of manual flipping and conveying. Finally, the cargo box is conveyed by the second conveying device until the second sensor detects that the cargo box has stopped conveying. The cargo box lifting device will then lift the cargo box to the target position for welding according to its size. This realizes the automation of the cargo box conveying system, which efficiently and accurately transports cargo boxes, improves the conveying efficiency, eliminates the need for manual flipping and cargo box transfer, reduces labor costs, and reduces the safety hazards caused by human operation. This solves the common technical problems of low efficiency and safety hazards associated with manual flipping and conveying.

[0094] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0095] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A cargo container conveying system, characterized in that, The cargo container conveying system includes: A first transmission system, a second transmission system, and a flipping system disposed between the first transmission system and the second transmission system; The first transmission system includes a first transmission device, a first sensing device, and a locking device, wherein the first sensing device and the locking device are respectively disposed on the first transmission device; The flipping system includes a third conveying device, a third sensing device, a positioning device, and a flipping device. The third sensing device includes a front-end sensing component and a rear-end sensing component. The front-end sensing component includes a first front-end sensing switch and a second front-end sensing switch, with the first front-end sensing switch located between the second front-end sensing switch and the rear-end sensing component. The flipping device contains the third conveying device and the positioning device. The third sensing device is mounted on the third conveying device. The flipping device carries a conveying unit for carrying and securing the cargo box. The positioning device includes a first positioning component on the connecting beam of the third conveying device, a second positioning component at both ends of the third conveying device, and a third positioning component on the conveying unit. The first positioning component rotates and abuts against the cargo box to block the conveying. The second positioning component uses a cylinder to drive the positioning element to abut against both sides of the cargo box to restrict circumferential movement. The third positioning component uses a cylinder to drive the positioning pin to insert into the positioning hole of the cargo box to restrict lifting and lowering movement. The second transmission system includes a second transmission device and a second sensing device, wherein the second sensing device is disposed on the second transmission device; The cargo box is conveyed via the first conveying device until the first sensing device detects that the conveying has stopped. The locking device then locks the cargo box and assembles workpieces onto it. After assembly, the cargo box is conveyed to the third conveying device until the front-end sensing component detects that the conveying has stopped. The front-end and rear-end sensing components identify the dimensions of the cargo box, which is then fixed by the positioning device and flipped by the flipping device. After flipping, the cargo box is conveyed to the second conveying device until the second sensing device detects that the conveying has stopped. The cargo box lifting device then lifts the cargo box to the target position for welding according to its dimensions. Specifically, when the first front-end sensor switch senses the cargo box, the rear-end sensor component confirms whether the cargo box has been sensed to identify its size; when the rear-end sensor component does not sense the cargo box, the size of the cargo box is determined to be a first size, the transmission stops, and the first positioning component of the positioning device is controlled to abut against the cargo box; when the rear-end sensor component senses the cargo box, the size of the cargo box is determined to be a second size, the transmission continues until the second front-end sensor switch senses the cargo box and stops the transmission, and the first positioning component is controlled to abut against the cargo box.

2. The cargo container conveying system according to claim 1, characterized in that, The first conveying device, the second conveying device, and the third conveying device each include two conveying supports. Each of the two conveying supports is equipped with a conveying motor and a conveying wheel. A connecting beam is provided between the two conveying supports. The output end of the conveying motor is connected to the conveying wheel. By driving the conveying motor to rotate, the conveying wheel is driven to roll and convey the cargo box.

3. The cargo container conveying system according to claim 2, characterized in that, The locking device is mounted on the connecting beam of the first conveying device. The locking device includes a locking cylinder and a locking member connected to the locking cylinder. The locking member is rotatably connected to the connecting beam. The first sensing device includes a first sensing component and a second sensing component respectively located on both sides of the first conveying device. The second sensing component is located on the side closer to the locking device. When the first sensing component senses the cargo box, it drives the first conveying device to convey the cargo box until the second sensing component senses that the cargo box has stopped conveying. Then, it controls the locking cylinder to retract, causing the locking member to rotate to abut against the cargo box and block the conveying of the cargo box.

4. The cargo container conveying system according to claim 3, characterized in that, The flipping device is equipped with a fourth conveying device, a fourth sensing device, and a first clamping device. The conveying unit is conveyed by the fourth conveying device until the fourth sensing device senses that the conveying unit has stopped conveying. The first clamping device clamps the conveying unit and then rotates and flips the conveying unit to the top of the flipping device. After the cargo box enters the flipping device, the conveying unit is used to fix the cargo box.

5. The cargo container conveying system according to claim 4, characterized in that, The first clamping device includes a first limiting block and a clamping assembly disposed on the fourth conveying device. The clamping assembly includes a first clamping cylinder and a first clamping arm and a second clamping arm connected to the first clamping cylinder. The first clamping arm and the second clamping arm are rotatably connected. When the fourth sensing device senses the conveying unit, the first limiting block and the first clamping arm abut against the conveying unit to restrict the movement of the conveying unit. Then, the first clamping cylinder is controlled to extend, so as to drive the second clamping arm to rotate toward the first clamping arm until the second clamping arm abuts against the conveying unit to clamp the conveying unit.

6. The cargo container conveying system according to claim 5, characterized in that, The two conveying supports of the second conveying device are respectively provided with second limiting blocks at the ends away from the flipping system. The conveying supports are connected to a second clamping device. The second clamping device includes a second clamping cylinder and a third clamping arm and a fourth clamping arm connected to the second clamping cylinder. The third clamping arm and the fourth clamping arm are rotatably connected. The conveying unit loaded with the cargo box is conveyed by the second conveying device until the second sensing device senses the cargo box. The second limiting block abuts against the conveying unit to restrict the movement of the conveying unit. Then, the second clamping cylinder is controlled to extend to drive the fourth clamping arm to rotate toward the third clamping arm until the fourth clamping arm abuts against the conveying unit to clamp the conveying unit. Then, the cargo box lifting device is controlled to lift the cargo box to the target position for welding.

7. The cargo container conveying system according to claim 6, characterized in that, The flipping device includes a flipping frame and a gear disposed on the flipping frame. By driving the rotation of the gear, the flipping frame is rotated, so that the cargo box positioned inside the flipping device is flipped.

8. A method for conveying a cargo container, applied to the cargo container conveying system according to any one of claims 1 to 7, characterized in that, The cargo container transport method includes: The first conveying device conveys the cargo box until the first sensing device detects that the cargo box has stopped conveying. The locking device then locks the cargo box and assembles the workpiece on the cargo box. After assembly, the cargo box is conveyed to the third conveying device. The cargo box is conveyed by the third conveying device until the front-end sensing component senses that the cargo box has stopped conveying. The size of the cargo box is identified by the front-end sensing component and the rear-end sensing component. The cargo box is fixed by the positioning device and flipped by the flipping device. After the flipping is completed, the cargo box is conveyed to the second conveying device. The cargo box is conveyed by the second conveying device until the second sensing device detects that the cargo box has stopped conveying. The cargo box lifting device will then lift the cargo box to the target position for welding according to the size of the cargo box.

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