Wheel type machine production method based on AGV flexible line and wheel type machine

Abstract

The present application relates to the technical field of mechanical equipment manufacturing, and discloses a wheeled machine production method based on AGV flexible line and a wheeled machine, the wheeled machine production method comprises a general assembly procedure of a gearbox, a rear axle, an engine, a front bracket, a front counterweight, a front axle, a cab, a hood and other part assemblies of a wheeled machine body carried on an AGV trolley, a wheel installation step of installing wheels to the wheeled machine body carried on the AGV trolley at a wheel installation and offline station, and an offline step of separating the wheeled machine from the AGV trolley, wherein a wheel installation space is formed on both sides of the AGV trolley through lifting of a lifting platform, so that the AGV trolley does not need to be provided with a higher supporting height or a lifting function for installing the wheels, and production personnel at each general assembly station can perform assembly work at a relatively low position, thereby effectively improving assembly efficiency and improving production safety.

Description

Technical Field

[0001] This invention relates to mechanical equipment manufacturing technology, specifically to a method for producing wheeled machinery based on an AGV flexible line. Furthermore, this invention also relates to a wheeled machine produced using this method. Background Technology

[0002] Traditional tractor assembly lines typically include two final assembly lines (pre-painting and post-painting) and eight sub-assemblies (or zones): a gearbox sub-assembly line, a rear axle sub-assembly line, an airtight break-in area, an engine docking sub-assembly area, a front axle sub-assembly line, a lifter sub-assembly line, a chassis painting area, and a cab sub-assembly line. These lines are generally laid out in parallel in the same direction. Automated lines use rail conveyors and chain drives, and primarily use self-propelled overhead trolleys to transport assemblies between different production lines. This type of assembly line suffers from high investment costs, a complex network of equipment both above and below ground, a large footprint, and a lack of flexibility in layout and length. Furthermore, material transport relies mainly on aerial transport, resulting in long empty journeys, difficult equipment maintenance, significant safety hazards, and complex warehousing and logistics processes.

[0003] With the development of intelligent manufacturing technology, flexible assembly lines that utilize AGVs (Automated Guided Vehicles) to replace the supporting carts in traditional assembly lines are gaining increasing attention in the manufacturing of mechanical equipment such as passenger cars, construction machinery, and agricultural machinery. In these lines, AGVs travel along the flexible final assembly line, transporting parts, assemblies, and the main body of mechanical equipment to different final assembly stations for assembly. This AGV-based flexible line production method eliminates the rigid tracks of traditional technology, thus allowing for easy adjustment of the final assembly stations and the trajectory of the flexible line according to the process requirements of sub-assembly and overall assembly.

[0004] To facilitate the assembly of parts and assemblies at different heights at various assembly stations, AGVs can be configured with lifting capabilities. This eliminates the need for production personnel to climb to higher positions for assembly work, or requires only minimal climbing. However, this complicates the structure and control of the AGVs, and for heavy machinery, the lifting function can reduce operational and load-bearing stability. Therefore, for wheeled machinery with large-diameter wheels, such as tractors, some assembly station personnel must climb onto relatively high AGVs to perform assembly work. This allows them to install the wheels onto the main body of the wheeled machinery supported by the AGV at the wheel installation station, and then use a lifting platform to support the installed wheels and lift the wheeled machinery off the AGV at the off-line station. This significantly impacts assembly efficiency and production safety. Summary of the Invention

[0005] The purpose of this invention is to overcome the problems of low assembly efficiency and safety hazards caused by the high support height of AGV trolleys in the existing wheeled machinery production based on AGV flexible lines. This invention provides a wheeled machinery production method based on AGV flexible lines, which helps to reduce the support height of AGV trolleys, thereby facilitating assembly operations by production personnel at each assembly station from a relatively low position, thereby improving assembly efficiency and enhancing production safety.

[0006] To achieve the above objectives, the present invention provides a method for producing wheeled machinery based on an AGV flexible line, comprising the following steps:

[0007] S1. The AGV trolley running along the final assembly line transports the wheeled mechanical body to be assembled to multiple final assembly stations on the final assembly line in sequence, and performs corresponding final assembly processes on the wheeled mechanical body carried on the AGV trolley at each of the final assembly stations, until the AGV trolley runs to the wheel installation and off-line station equipped with a lifting platform;

[0008] S21. The lifting platform is raised or lowered to form wheel mounting spaces on both sides of the AGV trolley;

[0009] S22. Install the wheels onto the wheeled mechanical body supported on the AGV trolley, wherein the installed wheels are spaced apart from the bearing surface directly below them;

[0010] S23. The lifting platform descends or rises, causing the wheels to contact the bearing surface, until the AGV trolley separates from the wheeled mechanical body;

[0011] S24. The AGV trolley and the wheeled mechanical body successively drive away from the wheel installation and off-line workstation.

[0012] Preferably, in step S21, the lifting platform is raised to lift the AGV trolley running on the lifting platform and the wheeled mechanical body carried on the AGV trolley; in step S22, the installed wheels are spaced apart from the ground directly below them, which serves as the bearing surface; in step S23, the lifting platform is lowered so that the wheels contact the ground until the AGV trolley separates from the wheeled mechanical body and the wheeled mechanical body is allowed to drive away from the wheel installation and off-line workstation.

[0013] Preferably, the wheel installation and unloading station is provided with two sets of lifting platforms arranged at intervals and raised and lowered synchronously. In step S21, the lifting platforms are lowered to form a wheel installation space above them. In step S22, the installed wheel is spaced apart from the top surface of the lifting platform directly below it. In step S23, the lifting platforms are raised so that the wheel contacts the top surface of the lifting platform until the AGV is separated from the wheeled mechanical body and the AGV is allowed to drive away from the wheel installation and unloading station.

[0014] Preferably, in step S24, one of the AGV trolley and the wheeled mechanical body first drives away from the wheel installation and off-line station, then the lifting platform is raised or lowered until its top surface is flush with the ground, and then the other of the AGV trolley and the wheeled mechanical body drives away from the wheel installation and off-line station.

[0015] Preferably, in step S21, the lifting or lowering stroke of the lifting platform is 200mm-300mm.

[0016] Preferably, the final assembly line is circular and includes parallel extending chassis and powertrain assembly sections and body and parts assembly sections.

[0017] Preferably, the AGV flexible line includes multiple sub-assembly production lines, the tail end of which is adjacent to the corresponding final assembly station on the final assembly production line, and / or, the head end of the sub-assembly production line is provided with a warehousing and logistics area.

[0018] Preferably, the plurality of said sub-assembly lines are arranged in parallel to each other, and / or, at least some of said sub-assembly lines extend in a direction perpendicular to the extension direction of said powertrain assembly section or body and parts assembly section.

[0019] Preferably, the chassis and powertrain assembly section includes a rear axle assembly workstation, a gearbox assembly docking workstation, an engine assembly docking workstation, a front axle assembly docking workstation, and a lifting / trailer assembly assembly workstation arranged sequentially along the running direction of the AGV vehicle, and / or, the body and accessories assembly section includes at least one of a hydraulic component and oil pipe assembly workstation, a wiring harness assembly workstation, a cab assembly workstation, and an engine hood assembly workstation.

[0020] A second aspect of the present invention provides a wheeled machine manufactured using the above-described wheeled machine manufacturing method.

[0021] Through the above technical solution, the wheeled machinery production method of the present invention installs the wheels onto the wheeled machinery body supported on the AGV trolley at the wheel installation and off-line station. The wheel installation space is formed on both sides of the AGV trolley by the lifting of the lifting platform. Therefore, it is not necessary to set the AGV trolley to have a high support height or a lifting function in order to install the wheels. The production personnel at each assembly station can perform assembly operations at a relatively low position, thereby effectively improving assembly efficiency and enhancing production safety. Attached Figure Description

[0022] Figure 1 This is a layout diagram of an AGV flexible production line used for manufacturing tractors;

[0023] Figure 2 This is a schematic diagram of a wheeled machinery production method according to a preferred embodiment of the present invention, in which the main body of the wheeled machinery is transported to the wheel installation and off-line station by an AGV trolley.

[0024] Figure 3 It is to install the wheels to Figure 2 A schematic diagram of the main body of a wheeled machine.

[0025] Figure 4 yes Figure 3 View from direction A;

[0026] Figure 5 yes Figure 3 View from direction B;

[0027] Figure 6 yes Figure 3 The diagram shows the lifting platform descending to separate the AGV trolley from the wheeled mechanical body.

[0028] Figure 7 yes Figure 6 A schematic diagram showing the wheeled machinery body after it leaves the wheel installation and off-line workstation;

[0029] Figure 8 This is a schematic diagram of the main body of a wheeled machine being transported to the wheel installation and off-line station by an AGV trolley in a wheeled machine production method according to another preferred embodiment of the present invention.

[0030] Figure 9 It is to install the wheels to Figure 8 A schematic diagram of the main body of a wheeled machine.

[0031] Figure 10 yes Figure 9 The C-direction view;

[0032] Figure 11 yes Figure 9 The D-direction view;

[0033] Figure 12 yes Figure 9 The diagram shows the lifting platform in the middle, which separates the wheeled mechanical body from the AGV trolley.

[0034] Figure 13 yes Figure 12 A schematic diagram showing the AGV trolley leaving the wheel installation and off-line workstation.

[0035] Explanation of reference numerals in the attached figures

[0036] 1- Rear axle assembly line workstation; 2- Transmission assembly docking workstation; 3- Air tightness / break-in workstation; 4- Engine assembly docking workstation; 5- Front bracket assembly docking workstation; 6- Front axle assembly docking workstation; 7- Lifting / trailer assembly assembly workstation; 8- Chassis painting workstation; 9- Hydraulic components and oil pipe assembly workstation; 10- Wiring harness assembly workstation; 11- Cab assembly workstation; 12- Engine hood assembly workstation; 13- Wheel installation and off-line workstation; 14- Rear axle sub-assembly line; 15- Transmission sub-assembly line; 16- Air tightness break-in workstation. Combined Area; 17-Engine Sub-assembly Line; 18-Front Axle Sub-assembly Line; 19-Lifter Sub-assembly Line; 20-Chassis Painting Line; 21-Cabin Sub-assembly Line; 22-Hood Sub-assembly Line; 23-Warehouse and Logistics Area; 24-Final Assembly Line; 25-AGV Cart; 26-Rear Axle Assembly; 27-Gearbox Assembly; 28-Engine Assembly; 29-Front Bracket Assembly; 30-Front Axle Assembly; 31-Lifting / Trailer Assembly; 32-Cabin; 33-Hood; 34-Wheels; 35-Lifting Platform; 36-Ground. Detailed Implementation

[0037] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0038] First, it should be noted that although the following description will mainly use the production process of tractors as an example to illustrate the wheeled machinery production method of the present invention, the wheeled machinery production method is also applicable to other wheeled machinery such as excavators and passenger cars.

[0039] To facilitate a better understanding of this invention, a brief description of the general production method for wheeled machinery based on an AGV flexible line is provided first. The main body of the wheeled machinery to be assembled is sequentially transported by AGV carts to various assembly stations on the assembly line. Under this load-bearing condition, assembly processes such as the assembly and docking of components and assemblies are performed until the wheel installation station. At the wheel installation station, the wheels are lifted and installed onto the main body of the wheeled machinery supported by the AGV cart. To facilitate wheel installation, the AGV cart needs to support the main body of the wheeled machinery at a relatively high height to ensure sufficient space for wheel installation. Afterward, the AGV cart moves to the off-line station, where a lifting platform jacks up the wheels to separate the wheeled machinery with the wheels installed from the AGV cart. The AGV cart can then circulate along the assembly line, and the wheeled machinery is off-lined. To install wheels, for heavy wheeled machinery such as tractors, the AGV trolleys in the AGV flexible line need to be set with a high support height. However, this means that production workers at some assembly stations in the preceding assembly process have to climb onto the relatively high AGV trolleys to perform assembly work, which causes inconvenience and seriously affects assembly efficiency and production safety.

[0040] To address this issue, the present invention provides a wheeled machinery production method based on an AGV flexible line. This wheeled machinery production method installs the wheels onto the main body of the wheeled machinery, which is supported by an AGV trolley, at the wheel installation and unloading station. That is, the wheel installation process and the separation process of the wheeled machinery from the AGV trolley (the unloading process of the wheeled machinery) are completed at the same station, effectively solving the problems of low assembly efficiency and safety hazards caused by the high support height of the AGV trolley in the above-mentioned general production methods.

[0041] Specifically, refer to Figure 1As shown, the wheeled machinery production method of the present invention includes multiple assembly processes performed at multiple assembly stations (such as rear axle assembly line station 1, gearbox assembly docking station 2, etc.) until the AGV trolley 25 moves to the wheel installation and unloading station 13 (step S1). During this process, the AGV trolley 25 runs along the assembly line 24 to transport the wheeled machinery body to be assembled to multiple assembly stations of the assembly line 24 in sequence, and performs corresponding assembly processes on the wheeled machinery body carried on the AGV trolley 25 at each assembly station. It is understood that the wheeled mechanical body described in this invention has an increasing number of parts, assemblies, or structures as the production process is implemented. For example, from the rear axle assembly line station 1 to the gearbox assembly docking station 2, the wheeled mechanical body carried on the AGV trolley 25 is only the rear axle assembly 26. The final assembly process at the rear axle assembly line station 1 is only to position the rear axle assembly 26 on the AGV trolley 25 (line up). The final assembly process at the gearbox assembly docking station 2 is to dock the gearbox assembly 27 to the rear axle assembly 26. Thus, after passing through the gearbox assembly docking station 2, the wheeled mechanical body carried on the AGV trolley 25 includes the rear axle assembly 26 and the gearbox assembly 27 docked together, and so on. For example, at chassis painting station 8, the wheeled machinery body (including rear axle assembly 26, gearbox assembly 27, engine assembly 28, front bracket assembly 29, front axle assembly 30, and lifting / trailer assembly 31, etc.) assembled in the preceding assembly process can be painted, thereby forming a coating layer on the surface of the chassis components of the aforementioned wheeled machinery body.

[0042] Further, at the wheel installation and off-line station 13, the wheels 34 are installed onto the main body of the wheeled machinery that has undergone the aforementioned final assembly process, thereby separating the wheeled machinery from the AGV trolley and completing the off-line process. The wheel installation and off-line station 13 is equipped with a lifting platform 35 to assist in the installation of the wheels 34 and the separation of the wheeled machinery from the AGV trolley (the off-line process of the wheeled machinery). Specifically, in Figures 2 to 13 In the different preferred embodiments shown, the installation of the wheels 34 and the unloading of the wheeled machinery are achieved through the following steps: S21. The lifting platform 35 is raised or lowered to form wheel installation spaces on both sides of the AGV trolley 25; S22. The wheels 34 are installed onto the wheeled machinery body supported on the AGV trolley 25, wherein the installed wheels 34 are spaced apart from the bearing surface directly below them, as shown in the figures below. Figures 3 to 5 and Figures 9 to 11 As shown; S23. The lifting platform 35 lowers or rises, causing the wheels 34 to contact the bearing surface, until the AGV trolley 25 separates from the wheeled mechanical body, as shown respectively. Figure 6 and Figure 12As shown; S24. The AGV trolley 25 and the wheeled machinery body (i.e., the wheeled machinery) equipped with wheels 34 successively leave the wheel installation and off-line station 13, respectively as shown in the figure. Figure 7 and Figure 13 As shown.

[0043] Therefore, the wheeled machinery production method of the present invention utilizes a lifting platform 35 to assist in the installation process of the wheels 34. By raising and lowering the lifting platform 35, wheel installation spaces are formed on both sides of the AGV trolley 25. This eliminates the need to configure the AGV trolley 25 with a high support height or lifting function for wheel installation. Production personnel at each assembly station can perform assembly operations from a relatively low position, thereby effectively improving assembly efficiency and production safety. This wheeled machinery production method is particularly suitable for the production of heavy machinery with large wheel diameters, such as tractors and excavators, effectively solving the problems of inconvenient assembly operations, low assembly efficiency, and safety hazards caused by the inconvenience of configuring AGV trolleys with lifting functions in flexible AGV-based production lines.

[0044] The following provides exemplary descriptions of the wheel installation and rolling-off processes in different preferred embodiments shown in the accompanying drawings:

[0045] like Figure 2 As shown, after the preliminary assembly process, the AGV trolley 25 (carrying the wheeled mechanical body to be installed) moves to the wheel installation and unloading station 13. A lifting platform 35 is located on the center line of this wheel installation and unloading station 13, and the AGV trolley 25 moves above this lifting platform 35. However, in order to reduce the support height of the AGV trolley 25, the space on both sides of the AGV trolley 25 is insufficient for wheel installation.

[0046] Therefore, such as Figures 3 to 5 As shown, the lifting platform 35 directly below the AGV trolley 25 is lifted, thereby raising the AGV trolley 25 and its wheeled mechanical body upwards. This increases the space below the wheeled mechanical body on both sides of the AGV trolley 25, creating a wheel installation space sufficient for the wheel installation process (S21). At this time, the wheel 34 is installed onto the wheeled mechanical body on the AGV trolley 25, and after installation, the wheel 34 is spaced apart from the ground 36 (i.e., the bearing surface) directly below it (S22).

[0047] Then, as Figure 6As shown, the lifting platform 35 descends, and the wheeled mechanical body equipped with wheels 34 moves downward, with the wheels 34 contacting the ground 36. At this time, the AGV trolley 25 has not yet separated from the wheeled mechanical body. The lifting platform 35 continues to descend until the AGV trolley 25 separates from the wheeled mechanical body (S23). At this point, the top surface of the lifting platform 35 where the AGV trolley 25 is located is lower than the ground 36, allowing the wheeled mechanical body to leave the wheel installation and off-line station 13.

[0048] Finally, combining Figure 6 and Figure 7 As shown, the wheeled machinery (the main body of the wheeled machinery equipped with wheels 34) first leaves the wheel installation and off-line station 13, and then the AGV trolley 25, which is separated from the wheeled machinery, leaves the wheel installation and off-line station 13 and enters the subsequent production task (S24). In order to facilitate the AGV trolley 25 leaving the wheel installation and off-line station 13, the lifting platform 35 can be raised (retracted) to a position flush with the ground 36, so that the AGV trolley 25 does not need to have high passability and can maintain operation within the same height plane.

[0049] Figures 8 to 13 It shows something different from the above. Figures 2 to 7 Another preferred embodiment. Wherein, combined with Figure 8 , Figure 10 and Figure 11 As shown, in this preferred embodiment, the wheel installation and unloading station 13 is provided with two sets of lifting platforms 35 arranged at intervals and raised and lowered synchronously. These two sets of lifting platforms 35 can be configured to be symmetrical about the center line of the wheel installation and unloading station 13. After the preliminary assembly process, the AGV trolley 25 (carrying the wheel to be installed) moves to the wheel installation and unloading station 13, and the AGV trolley 25 moves to the ground area between the two sets of lifting platforms 35. However, in order to reduce the support height of the AGV trolley 25, the space on both sides of the AGV trolley 25 is insufficient for wheel installation.

[0050] Therefore, such as Figures 9 to 11 As shown, the two sets of lifting platforms 35 descend, increasing the space below the suspended portions of the wheeled mechanical body located on both sides of the AGV trolley 25, thus forming a wheel installation space above the lifting platforms 35 sufficient for the wheel installation process (S21). At this time, the wheels 34 are installed onto the wheeled mechanical body on the AGV trolley 25, and after installation, the wheels 34 are spaced apart from the top surface (i.e., the bearing surface) of the lifting platform 35 directly below them (S22).

[0051] Then, as Figure 12As shown, the lifting platform 35 rises, and its top surface contacts the wheel 34. At this time, the main body of the wheeled machinery has not yet separated from the AGV trolley 25. The lifting platform 35 continues to rise until the main body of the wheeled machinery separates from the AGV trolley 25 (S23). At this time, the top surface of the lifting platform 35 where the wheeled machinery (the main body of the wheeled machinery with the wheel 34 installed) is located is higher than the ground 36, allowing the AGV trolley 25 to drive away from the wheel installation and off-line station 13.

[0052] Finally, combining Figure 12 and Figure 13 As shown, the AGV trolley 25 separates from the wheeled machinery and first drives away from the wheel installation and off-line station 13 to enter the subsequent production task. Then, the wheeled machinery drives away from the wheel installation and off-line station 13 (S24). In order to facilitate the wheeled machinery to drive away from the wheel installation and off-line station 13, the lifting platform 35 can be lowered (returned) to a position flush with the ground 36. This eliminates the need for the wheeled machinery to cross the height difference between the top surface of the lifting platform 35 and the ground 36 formed for separation, so as to smoothly descend the line.

[0053] In the above steps, the lifting and lowering strokes of the lifting platform 35 do not need to be too large, as long as they can meet the requirements for wheel installation and separation of the wheeled machinery from the AGV trolley. For example, in step S21, which forms the wheel installation space before installing the wheel 34, the lifting or lowering stroke of the lifting platform 35 can be set to 200mm-300mm. As a result, the height difference between the installed wheel 34 and the corresponding bearing surface is small, which helps to reduce the energy consumption of the hydraulic system used for the lifting platform 35.

[0054] Continue to refer to Figure 1As shown, the final assembly line 24 in this invention can be configured as a ring, including parallel extending chassis and powertrain assembly sections and body and parts assembly sections. Thus, the final assembly line 24 can be generally elongated, facilitating assembly management and the subsequent arrangement of various sub-assembly lines, such as those arranged on both sides of the final assembly line 24 corresponding to the chassis and powertrain assembly sections and the body and parts assembly sections. In the illustrated final assembly line 24 for tractors, the chassis and powertrain assembly section includes, sequentially along the running direction of the AGV trolley 25, a rear axle assembly loading station 1, a gearbox assembly docking station 2, an airtight / break-in station 3, an engine assembly docking station 4, a front bracket assembly docking station 5, a front axle assembly docking station 6, and a lifting / trailer assembly assembly station 7, thereby sequentially performing the following: rear axle assembly 26 loading, gearbox assembly docking 27, airtight break-in, engine assembly docking 28, and front bracket assembly docking. 29. The assembly process includes connecting the front axle assembly 30 and assembling the lifting / trailer assembly 31, among others. The body and parts assembly section includes, sequentially along the running direction of the AGV trolley 25, a chassis painting station 8, a hydraulic component and oil pipe assembly station 9, a wiring harness assembly station 10, a cab assembly station 11, a hood assembly station 12, and a wheel installation and unloading station 13, thus sequentially performing chassis painting, hydraulic component and oil pipe assembly, wiring harness assembly, cab unloading 32, hood unloading 33, and wheel installation 34, among other assembly processes. It is understood that, depending on different production requirements, such as for producing wheeled machinery other than tractors, the above or other assembly processes can be deleted, added, or adjusted. This arrangement further enhances the flexibility of the production line, combining the box assembly line, pre-painting line, and post-painting line together, and facilitating closer coordination with the subsequent sub-assembly production line.

[0055] As mentioned earlier, the AGV trolley 25 runs along the final assembly line 24 (walking, stopping, turning, or charging), and can cooperate with the sub-assembly lines to complete the overall assembly of the wheeled machinery. Figure 1In the preferred embodiment shown, the AGV flexible line also includes multiple sub-assembly lines, such as rear axle sub-assembly line 14, gearbox sub-assembly line 15, airtight break-in area 16, engine sub-assembly line 17, front axle sub-assembly line 18, lifter sub-assembly line 19, chassis painting line 20, cab sub-assembly line 21, and hood sub-assembly line 22. The ends of these sub-assembly lines are adjacent to the corresponding final assembly stations on the final assembly line 24. For example, the end of gearbox sub-assembly line 15 is aligned with gearbox assembly docking station 2. Thus, gearbox assembly 27 can be docked with rear axle assembly 26 immediately at gearbox assembly docking station 2 after sub-assembly (after a short-distance relocation). This facilitates the elimination or reduction of bulky aerial self-propelled vehicle equipment, such as using simple lifting equipment like KBK to lift gearbox assembly 27, saving production costs. In an alternative embodiment, each or part of the sub-assembly lines can also use AGVs equipped with corresponding support fixtures to complete the final assembly and transportation.

[0056] Furthermore, multiple sub-assembly production lines can be arranged parallel to each other, and / or, at least some of the sub-assembly production lines extend perpendicularly to the extension direction of the powertrain final assembly section or the body and parts final assembly section. With the above arrangement, the main production lines of the present invention are clearly defined, avoiding problems such as complex layouts and management inconveniences caused by intersecting logistics channels. Additionally, a warehousing and logistics area 23 can be provided at the beginning of the sub-assembly production line (i.e., the end furthest from the final assembly production line 24).

[0057] Based on this, the present invention also provides a wheeled machine, such as a tractor, excavator, or passenger car, produced using the above-mentioned wheeled machinery production method.

[0058] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A method for producing wheeled machinery based on an AGV flexible line, characterized in that, Includes the following steps: S1. The AGV trolley (25) running along the assembly line (24) transports the wheeled mechanical body to be assembled to multiple assembly stations on the assembly line (24) in sequence, and performs corresponding assembly processes on the wheeled mechanical body carried on the AGV trolley (25) at each assembly station until the AGV trolley (25) runs to the wheel installation and off-line station (13) equipped with a lifting platform (35). S21. The lifting platform (35) is raised or lowered to form wheel mounting spaces on both sides of the AGV trolley (25); S22. Install the wheel (34) onto the wheeled mechanical body carried on the AGV trolley (25), wherein the installed wheel (34) is spaced apart from the bearing surface directly below it; S23. The lifting platform (35) lowers or rises, so that the wheel (34) contacts the bearing surface until the AGV trolley (25) separates from the wheeled mechanical body; S24. The AGV trolley (25) and the wheeled mechanical body successively drive away from the wheel installation and off-line station (13).

2. The method for producing wheeled machinery according to claim 1, characterized in that, In step S21, the lifting platform (35) is raised to lift the AGV trolley (25) running on the lifting platform (35) and the wheeled mechanical body carried on the AGV trolley (25); in step S22, the installed wheel (34) is spaced apart from the ground (36) directly below it, which serves as the bearing surface; in step S23, the lifting platform (35) is lowered so that the wheel (34) contacts the ground (36) until the AGV trolley (25) separates from the wheeled mechanical body and allows the wheeled mechanical body to drive away from the wheel installation and off-line station (13).

3. The method for producing wheeled machinery according to claim 1, characterized in that, The wheel installation and unloading station (13) is provided with two sets of lifting platforms (35) arranged at intervals and raised and lowered synchronously. In step S21, the lifting platform (35) is lowered to form the wheel installation space above the lifting platform (35). In step S22, the installed wheel (34) is spaced apart from the top surface of the lifting platform (35) directly below it. In step S23, the lifting platform (35) is raised so that the wheel (34) contacts the top surface of the lifting platform (35) until the AGV (25) is separated from the wheeled mechanical body and the AGV (25) is allowed to drive away from the wheel installation and unloading station (13).

4. The method for producing wheeled machinery according to claim 1, characterized in that, In step S24, one of the AGV trolley (25) and the wheeled mechanical body first drives away from the wheel installation and off-line station (13), and then the lifting platform (35) is raised or lowered until the top surface of the lifting platform (35) is flush with the ground (36), and then the other of the AGV trolley (25) and the wheeled mechanical body drives away from the wheel installation and off-line station (13).

5. The method for producing wheeled machinery according to claim 1, characterized in that, In step S21, the lifting or lowering stroke of the lifting platform (35) is 200mm-300mm.

6. The method for producing wheeled machinery according to claim 1, characterized in that, The final assembly line (24) is circular and includes parallel extending chassis and powertrain assembly sections and body and parts assembly sections.

7. The method for producing wheeled machinery according to claim 6, characterized in that, The AGV flexible line includes multiple sub-assembly production lines, the tail end of which is adjacent to the corresponding final assembly station on the final assembly production line (24), and / or, the head end of the sub-assembly production line is provided with a warehousing and logistics area (23).

8. The method for producing wheeled machinery according to claim 7, characterized in that, The plurality of said sub-assembly lines are arranged in parallel to each other, and / or, at least some of said sub-assembly lines extend in a direction perpendicular to the extension direction of said chassis and powertrain assembly section or body and parts assembly section.

9. The method for producing wheeled machinery according to claim 6, characterized in that, The chassis and powertrain assembly section includes a rear axle assembly workstation (1), a gearbox assembly docking workstation (2), an engine assembly docking workstation (4), a front axle assembly docking workstation (6), and a lifting / trailer assembly assembly workstation (7) arranged sequentially along the running direction of the AGV (25). Alternatively, the body and accessories assembly section includes at least one of the following: a hydraulic component and oil pipe assembly workstation (9), a wiring harness assembly workstation (10), a cab assembly workstation (11), and a hood assembly workstation (12).

10. A wheeled machine, characterized in that, The wheeled machinery is manufactured using the wheeled machinery production method according to any one of claims 1 to 9.

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