Feeding system for general assembly workshop

Abstract

The invention discloses a general assembly workshop feeding system which comprises a material trolley, a material sorting station, a line edge split charging station and a concentrated split charging station, the material sorting station, the line edge split charging station and the concentrated split charging station are arranged in a general assembly workshop, and the running path of the material trolley sequentially penetrates through the material sorting station, the line edge split charging station and the concentrated split charging station; the material trolley loads to-be-assembled materials at the material sorting station, the sub-assemblies are loaded on the line edge sub-packaging station and the centralized sub-packaging station, and the technical problems that in the prior art, a feeding process chain is long, and the logistics path is complex are solved.

Description

Technical Field

[0001] This invention relates to the field of industrial manufacturing logistics technology, specifically to a material supply system for the final assembly workshop. Background Technology

[0002] In the final assembly process of automobiles, vehicle assembly typically adopts a multi-model mixed-line production mode, with different models being produced alternately on the same assembly line according to a predetermined rhythm. Due to the differences in configuration, structure, and types of parts among different models, high requirements are placed on the accuracy, timing matching, and flexibility of parts supply.

[0003] Sequential feeding is one of the commonly used feeding methods in the final assembly workshop. In existing sequential feeding systems, material sorting, packaging, and feeding are usually set up in different functional areas, and different workstations or equipment complete the corresponding tasks. The work units are mostly connected in segments, and intermediate buffer zones or additional logistics transfer equipment are often required between different processes to achieve material handover, so as to coordinate the differences in cycle time of each workstation and ensure the continuity of material supply.

[0004] Therefore, under the existing material supply method, different processes need to be connected through multiple transfers or intermediate buffers, which easily leads to a long material supply chain and complex logistics paths, making the material supply organization less compact. How to reduce the transfer and buffer links between processes and make the material supply process more compact has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a material supply system for the final assembly workshop, which solves the technical problems of long material supply chain and complex logistics path in the prior art.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: This invention provides a material supply system for a final assembly workshop, comprising: a material cart; a material sorting station, a line-side sub-assembly station, and a centralized sub-assembly station set up in the final assembly workshop, wherein the travel path of the material cart sequentially passes through the material sorting station, the line-side sub-assembly station, and the centralized sub-assembly station; the material cart loads materials to be assembled at the material sorting station, and loads sub-assemblies at the line-side sub-assembly station and the centralized sub-assembly station.

[0007] In some embodiments, multiple material carts are configured, and each material cart is configured to sequentially pass through a material sorting station, a line-side sub-packaging station, and a centralized sub-packaging station, and load materials or sub-assemblies at each station.

[0008] In some embodiments, at least some line-side and centralized packaging stations are configured to perform the operations corresponding to the material sorting stations.

[0009] In some embodiments, the travel route of the material cart includes a loop, which is used to return the material cart to the material sorting station after passing through the centralized packaging station.

[0010] In some embodiments, the line-side sub-assembly station and the centralized sub-assembly station are configured to load the sub-assemblies directly onto the material cart.

[0011] In some embodiments, the material cart is provided with a material box for carrying sub-assemblies.

[0012] In some embodiments, multiple material boxes are provided, and different material boxes are used to carry different types of sub-assemblies.

[0013] In some embodiments, the inner wall of the material box is provided with a protective layer, which is used to reduce contact wear between the sub-assemblies and the inner wall of the material box.

[0014] In some embodiments, a limiting portion is provided at the periphery of the opening of the material box, which is used to restrict the sub-assembly from being dislodged from the opening of the material box.

[0015] In some embodiments, the material box and the material cart are detachably connected.

[0016] Compared with existing technologies, the final assembly workshop material supply system provided by this invention arranges material sorting stations, line-side sub-assembly stations, and centralized sub-assembly stations sequentially along the same material supply path. Material carts then pass through each station sequentially to carry materials and sub-assemblies, creating a continuous connection between sorting, sub-assembly, and material supply along the same path. After sorting, materials can be gradually replenished and improved at subsequent stations and directly enter the assembly process with the cart, reducing the need for transfers and buffering between processes, shortening the material supply chain, and simplifying logistics organization. Simultaneously, the operation of each station along the same material supply path facilitates a continuous supply rhythm, making the material supply process more compact and orderly, thereby improving the overall coordination and ease of implementation of the sequential material supply system in the final assembly workshop. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the material supply system for the final assembly workshop provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the material cart provided in an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: 10. Material cart; 11. Material box; 12. Protective layer; 13. Limiting part; 21. Material sorting station; 22. Line-side packaging station; 23. Centralized packaging station; 30. Circulation loop. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0020] To address the technical problems of long material supply chains and complex logistics paths in existing technologies, this invention provides a material supply system for the final assembly workshop, which can reduce inter-process transfers and buffering, making the material supply process more compact.

[0021] It should be noted that the final assembly workshop material supply system described in this invention is used for, but not limited to, industrial manufacturing logistics. For ease of explanation, this invention only uses the application of the final assembly workshop material supply system to industrial manufacturing logistics as an example. The principle of the final assembly workshop material supply system applied to other types of equipment is essentially the same as that applied to industrial manufacturing logistics, and will not be elaborated here.

[0022] Please see Figure 1 , Figure 1 This is a schematic diagram of the material supply system for the final assembly workshop provided in an embodiment of the present invention. The material supply system is located within the automotive final assembly workshop and mainly includes a material cart 10 and material sorting stations 21, line-side assembly stations 22, and centralized assembly stations 23 arranged sequentially along the material supply direction. Each station is arranged sequentially on the workshop floor along the same material supply channel. For example, it can be arranged linearly along one side of the assembly line, or it can be arranged in a zigzag or circular pattern depending on the workshop space conditions, but all arrangements ensure that the material cart 10 can sequentially reach each station along the same travel route.

[0023] The material trolley 10 serves as a material supply carrier, used to carry materials to be assembled and sub-assemblies. It can be a manually pushed trolley or an automated guided trolley. The trolley is equipped with a material-carrying part, such as a material box 11, a material frame, or a dividing tray, to distinguish and store different types of materials or materials corresponding to different vehicle models.

[0024] Material sorting station 21 is mainly used to select and organize parts according to the production sequence. For example, according to the production plan, the operator takes out the parts corresponding to the current production vehicle from the shelf or turnover box and puts them into different carrying areas of the material cart 10 in sequence, so that the materials entering the subsequent stations are already matched with the production sequence of the whole vehicle.

[0025] The line-side sub-assembly station 22 is located near the assembly line and is used to assemble some parts into sub-assemblies. For example, multiple small parts installed in the same location are pre-assembled, or fasteners are placed with corresponding mounting parts to form sub-assemblies, which are then placed directly on the corresponding positions on the material cart 10.

[0026] The centralized sub-assembly station 23 can be set as a relatively fixed sub-assembly area to complete the sub-assembly of another part of the parts, such as combining, classifying and packaging or configuring multiple parts in a centralized manner to form a sub-assembly that can be directly put into use on the production line, and then loading it onto the material cart 10.

[0027] During the actual material supply process, the material trolley 10 moves sequentially along the above-mentioned workstations. After the basic material loading is completed at the material sorting workstation 21, it continues to travel to the line-side sub-assembly workstation 22 and the centralized sub-assembly workstation 23. Each workstation then loads the sub-assemblies that have been sub-assembled into the trolley, so that a trolley can gradually complete the material carrying of multiple processes in one trip. Subsequently, the loaded materials and sub-assemblies are delivered to the corresponding assembly positions for use.

[0028] In this embodiment, by arranging the material sorting station 21, the line-side sub-assembly station 22, and the centralized sub-assembly station 23 sequentially along the same material supply path, and by having the material trolley 10 pass through each station in sequence during its journey to complete material loading and sub-assembly replenishment, the originally dispersed sorting, sub-assembly, and material supply operations are made to form a continuous connection within the same material supply path. This reduces the reliance on intermediate transfer and buffering links between different processes during the material supply process, allowing materials to be gradually refined at subsequent stations and directly used for assembly after sorting, thus making the overall material supply process more compact.

[0029] In some embodiments, the material feeding system can simultaneously deploy multiple material carts 10 to adapt to production scenarios with fast production cycles for mixed-model production lines or large material supply volumes per cart. Multiple material carts 10 can run sequentially at certain intervals on the same feeding channel, or they can be deployed in batches according to the production plan, thereby improving the overall material supply capacity.

[0030] Each material cart 10 is used as an independent feeding unit, and its structure is designed to carry materials to be assembled and sub-assemblies. When in use, each material cart 10 runs according to a predetermined feeding route, arriving sequentially at the material sorting station 21, the line-side sub-assembly station 22, and the centralized sub-assembly station 23. At each station, it receives the corresponding materials or sub-assemblies, so that each cart can gradually complete the material carrying of multiple processes in one trip.

[0031] For example, in multi-model mixed production lines, material carts 10 can be assigned to different models to enter the material supply route. Each cart only loads materials corresponding to its model when passing through each workstation, thus avoiding the mixing of materials from different models. At the same time, when one material cart 10 enters a subsequent workstation, another material cart 10 can sort and load materials at the preceding workstation, enabling continuous operation at each workstation and improving the continuity of the material supply operation.

[0032] In this embodiment, multiple material carts 10 operate as independent feeding units within the same feeding system. Each material cart 10 can sequentially complete the entire process of material sorting, repackaging, and feeding, allowing a single cart to handle the entire feeding process. When multiple carts operate in parallel, different material carts 10 can be distributed across different workstations to carry out operations, thus creating a natural connection between material sorting, repackaging, and feeding operations in time. Each workstation can continue operating without waiting for a single cart to travel back and forth, ensuring a continuous feeding process with the cooperation of multiple carts.

[0033] In one embodiment, the partial line-side packaging station 22 and the centralized packaging station 23 are configured to perform the operations corresponding to the material sorting station 21, in addition to completing the packaging operations. That is, these stations can be equipped with material storage areas, sorting workbenches, and areas for placing turnover boxes or racks, allowing relevant materials to be temporarily stored and organized at these stations. For example, multi-layer racks or mobile turnover carts can be set up on one side of the station to store parts to be sorted, allowing operators to select and organize the corresponding materials according to the production sequence while performing packaging operations.

[0034] In actual use, when some materials are not sorted at the front-end material sorting station 21 or need to be sorted again, the relevant materials can enter the subsequent station along with the material cart 10. The operators at the line-side packaging station 22 or the centralized packaging station 23 will then identify, select, and sort the materials in sequence at their respective stations, and place the sorted materials into the corresponding carrying area of ​​the material cart 10. In this way, the sorting operation, which was originally concentrated at a single sorting station, can also be carried out in multiple subsequent stations, thus forming a multi-station shared operation mode.

[0035] In this embodiment, the sorting operation no longer relies solely on a single fixed workstation, but can be flexibly carried out at multiple workstations along the material supply path, enabling the material supply system to maintain a sequential material supply mode while possessing a certain degree of operational adjustment capability. With the line-side packaging workstation 22 and the centralized packaging workstation 23 equipped with sorting functions, even if some materials are not fully sorted at the front end, they can continue to be sorted and loaded at subsequent workstations, allowing the materials to be gradually perfected during the vehicle's flow, thus forming a natural connection with subsequent material supply operations.

[0036] In one embodiment, the material trolley 10 has a loop 30 in its travel route, forming a closed or semi-closed loop for material supply. The loop 30 can be arranged on the floor of the assembly workshop, for example, by laying guide signs, magnetic navigation paths, or track paths on the workshop floor to form a continuous loop, enabling the material trolley 10 to circulate along a predetermined route.

[0037] In this arrangement, after the material cart 10 has finished loading the materials at the centralized packaging station 23, it can continue to travel along the loop 30 and return to the material sorting station 21, thus entering the next round of material supply cycle. For example, after the material cart 10 has completed a round of material supply and delivered the materials to the designated location, it can return to the front station empty or with turnover equipment along the loop, and be used again to load a new round of materials to be assembled.

[0038] In this embodiment, the circulation loop 30 enables the material carts 10 to form a continuously rotating operating path within the workshop, avoiding frequent changes in operating routes or manual scheduling adjustments. When multiple material carts 10 operate in coordination, different carts can be distributed and run in different sections of the circulation loop 30, so that some carts are in the front-end material loading stage and some carts are in the rear-end dispensing and replenishment stage, thereby forming a continuous material supply rhythm.

[0039] In one embodiment, the line-side sub-assembly station 22 and the centralized sub-assembly station 23 are configured to directly load the sub-assemblies into the material cart 10. These stations are arranged close to the material cart 10's travel path, allowing loading operations to be performed as the material cart 10 stops or slows down while passing through the station. For example, an operating table or sub-assembly table can be provided on one side of the station, allowing the sub-assemblies to be placed directly within the material cart 10's carrying area without requiring additional transfer.

[0040] At the on-line sub-assembly station 22, after completing the assembly of sub-assemblies, the operator can directly place the corresponding sub-assemblies into designated positions on the material cart 10, such as placing them in the corresponding material box 11 or partition area, based on the current load capacity of the material cart 10. The centralized sub-assembly station 23 can also use a similar method, directly loading the sub-assemblies formed at this station onto the material cart 10, allowing sub-assembly and loading to be completed continuously at the same station.

[0041] In actual layout, the line-side sub-assembly station 22 and the centralized sub-assembly station 23 can be arranged sequentially along the travel direction of the material trolley 10, allowing the material trolley 10 to gradually replenish sub-assemblies as it passes through each station. For example, after the material trolley 10 completes part of the material loading at the preceding station, it continues to receive sub-assemblies at the subsequent sub-assembly station, enabling one material trolley 10 to gradually load multiple types of sub-assemblies during its journey. Through this method, the sub-assemblies can enter the material trolley 10 to participate in the subsequent material supply process immediately after sub-assembly, establishing a spatial connection between the sub-assembly operation and the material loading, thus forming an integrated sub-assembly and loading operation mode under a continuous material supply path.

[0042] Please see Figure 2 , Figure 2This is a schematic diagram of the structure of a material trolley provided in an embodiment of the present invention. In some embodiments, the material trolley 10 is provided with a material box 11 for carrying sub-assemblies, used for classifying and stably supporting different sub-assemblies. The material box 11 can be installed on the upper part of the material trolley 10, for example, arranged on the support platform on the frame, or it can be set on both sides of the trolley or layered at different heights to accommodate the placement requirements of sub-assemblies of different sizes. The material box 11 can have an open receiving structure, such as an open box or a tray structure, allowing operators to directly place or remove sub-assemblies from above.

[0043] In practical use, the sub-assemblies formed at the line-side sub-assembly station 22 or the centralized sub-assembly station 23 can be directly placed into the corresponding material box 11. The material box 11 plays a role in centralized bearing and positional constraint of the sub-assemblies, keeping them relatively stable during vehicle movement. When operators retrieve materials at the assembly line, they can quickly find the corresponding sub-assemblies according to the sections of the material box 11, thus facilitating subsequent assembly operations.

[0044] In this embodiment, by setting a material box 11 on the material cart 10, the sub-assemblies have a relatively fixed placement area during the material supply process, which is conducive to maintaining the orderliness of material placement and enabling sub-assemblies from different sources to be classified and carried on the same material cart 10.

[0045] Furthermore, in one embodiment, the material boxes 11 on the material cart 10 can be configured as multiple, for carrying different types of sub-assemblies respectively. The multiple material boxes 11 can be arranged side by side or in sections on the material cart 10, for example, arranged sequentially along the travel direction of the material cart 10, or distributed on the left and right sides of the cart body, so that different material boxes 11 form relatively independent carrying areas in spatial position.

[0046] Different material boxes 11 can be distinguished according to the type, purpose, or corresponding assembly part of the sub-assembly. For example, sub-assemblies used for door assembly and sub-assemblies used for dashboard assembly can be placed in different material boxes 11, or sub-assemblies corresponding to different vehicle models can be placed in their respective material boxes 11, thereby avoiding mixing of different sub-assemblies during transportation. If necessary, each material box 11 can also be distinguished by labels, color codes, or numbers to facilitate quick identification by operators.

[0047] In the actual material supply process, after each sub-assembly station completes the production of its sub-assemblies, it can place them into the corresponding material box 11 according to the sub-assembly type, so that the material cart 10 gradually forms a classified carrying state during its movement. When the material cart 10 arrives at the assembly position, the operator can quickly retrieve the corresponding sub-assembly according to the partition of the material box 11, thereby improving the convenience of material retrieval. In this embodiment, by setting multiple material boxes 11 and classifying them for carrying, different sub-assemblies are kept in a partitioned placement state on the same material cart 10, which helps to maintain the clarity of material placement and enables orderly management of multiple sub-assemblies under the condition of transporting them in the same vehicle.

[0048] In one embodiment, a protective layer 12 is provided on the inner wall of the material box 11 to provide cushioning and protection when the sub-assembly comes into contact with the inner wall of the material box 11. The protective layer 12 can be provided in the area inside the material box 11 where the sub-assembly may come into contact, such as the bottom wall and side wall of the material box 11, so that the sub-assembly forms a relatively flexible contact interface with the material box 11 during placement, removal or movement with the material cart 10.

[0049] The protective layer 12 can be formed of a material with certain elasticity or wear resistance, such as a rubber layer, a foam material layer, a flexible polymer layer, or a fabric lining, so that the sub-assembly does not directly contact the rigid inner wall of the material box 11 when it comes into contact with the material box 11. The protective layer 12 can be fixed to the inner wall of the material box 11 by adhesion, embedding, or replacement, so as to facilitate maintenance or replacement as needed.

[0050] In practical use, when the sub-assembly is placed into the material box 11, the protective layer 12 forms a buffer interface between the sub-assembly and the material box 11, reducing direct friction or collision on the surface of the sub-assembly when it comes into contact with the material box 11 due to vibration or slight displacement during the movement of the material trolley 10. For sub-assemblies with painted surfaces, decorative parts, or finished surfaces, the protective structure provides a gentler contact environment. In this embodiment, by providing the protective layer 12 on the inner wall of the material box 11, the material box 11 serves both a supporting and protective function when carrying the sub-assembly, thereby maintaining a relatively stable placement of the sub-assembly during material supply and transportation.

[0051] In one embodiment, a limiting part 13 is provided at the periphery of the opening of the material box 11 to constrain the sub-assemblies placed in the material box 11 in the opening direction. The limiting part 13 may be provided as a whole along the edge of the opening of the material box 11, or it may be provided only at a part of the periphery of the opening, so that the material box 11 can have the ability to basically limit the sub-assemblies while maintaining an open structure to facilitate the loading and unloading of materials.

[0052] The limiting part 13 can be implemented in various structural forms. For example, the opening edge of the material box 11 can extend inward to form a ring or semi-ring edge, so that the opening forms an inward edge structure; or a locally raised frame can be formed at the opening of the material box 11, so that the opening edge of the material box 11 is higher than the inner bottom surface of the material box 11 by a certain height, thereby forming a block when the sub-assembly has a tendency to move. For sub-assemblies with relatively regular shapes, the limiting part 13 can be set on opposite sides to provide basic limiting while ensuring placement convenience.

[0053] In some embodiments, the limiting part 13 may also adopt a structure with a certain deformation capability, such as a flexible baffle, an elastic pressure strip, or a flip-type baffle, so that the limiting part 13 can make appropriate clearance when the sub-assembly is placed in, and return to the limiting position after the sub-assembly enters the material box 11, thus retaining the sub-assembly. For example, when the sub-assembly is placed in the material box 11, the flexible baffle abuts against the side of the sub-assembly under its own elasticity, thereby constraining it in the opening direction during the movement of the material cart 10.

[0054] During actual material supply, the material trolley 10 may start, stop, turn, or traverse uneven ground while running in the workshop, potentially causing slight displacement of the sub-assemblies within the material box 11. By providing the aforementioned limiting part 13 at the periphery of the opening, the sub-assemblies are constrained by the opening edge structure when they tend to displace, thus remaining within the accommodating range of the material box 11. In this embodiment, by providing the limiting part 13, the material box 11 maintains an opening for easy material handling while also possessing a certain degree of constraint in the opening direction. This allows the material box 11 to combine accommodating and limiting functions when carrying the sub-assemblies, thereby adapting to the working environment where the trolley moves during material supply in the workshop.

[0055] In one embodiment, the material box 11 and the material cart 10 are detachably connected, allowing the material box 11 to be installed and removed from the material cart 10. The material box 11 can be placed on the support platform of the material cart 10, and the support platform can have a reserved installation area for placing the material box 11, so that the material box 11 has a relatively stable position in the horizontal direction after being placed.

[0056] Detachable connections can be achieved through various structural forms. For example, the bottom of the material box 11 can be provided with a plug-in part that cooperates with the plug-in hole or plug-in seat on the material trolley 10 carrying platform, so that the material box 11 can be fixed on the material trolley 10 by insertion; a snap-fit ​​structure can also be used, by providing a snap-fit ​​part at the bottom of the material box 11 to cooperate with the snap-fit ​​part on the material trolley 10, so as to achieve quick installation and disassembly; or a limiting pin and positioning hole can be used to fix the material box 11 in place by the pin.

[0057] In some embodiments, the detachable connection structure can also serve as a limiting function, preventing the material box 11 from sliding during the movement of the material cart 10. For example, a positioning protrusion can be provided at the bottom of the material box 11, which cooperates with the positioning groove on the support platform, so that the material box 11 is restricted in the front-back or left-right direction after placement, thereby maintaining placement stability.

[0058] In practical use, when different production tasks require a change in the type of material being carried, the original material box 11 can be removed from the material cart 10 and replaced with a material box 11 that is suitable for the current material supply requirements. For example, the corresponding material box 11 can be selected for assembly according to different vehicle models, different parts categories, or different sub-assembly specifications, so that the material cart 10 can adapt to various material supply scenarios while maintaining the main structure unchanged.

[0059] In this embodiment, by detachably connecting the material box 11 to the material cart 10, the material box 11 can be installed and removed according to actual material supply needs. When the material supply content or sub-assembly type changes, the material box 11 can be replaced or rearranged, thus ensuring the material cart 10 remains adaptable to different material supply tasks. Simultaneously, the detachable connection also facilitates individual maintenance, cleaning, or replacement of the material box 11, ensuring it remains in good working order during long-term use.

[0060] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A material supply system for a final assembly workshop, characterized in that, include: Material cart; Material sorting stations, line-side repackaging stations, and centralized repackaging stations are located within the final assembly workshop. The material cart's travel path sequentially passes through the material sorting station, the line-side sub-assembly station, and the centralized sub-assembly station; the material cart loads materials to be assembled at the material sorting station, and loads sub-assemblies at the line-side sub-assembly station and the centralized sub-assembly station.

2. The final assembly workshop material supply system according to claim 1, characterized in that, The material carts are configured in multiple ways, and each material cart is configured to pass through the material sorting station, the line-side sub-packaging station and the centralized sub-packaging station in sequence, and load materials or sub-assemblies at each station respectively.

3. The final assembly workshop material supply system according to claim 2, characterized in that, At least some of the line-side sub-packaging stations and the centralized sub-packaging stations are configured to have the function of performing the operations corresponding to the material sorting stations.

4. The final assembly workshop material supply system according to claim 2, characterized in that, The material cart's travel route includes a loop, which is used to allow the material cart to return to the material sorting station after passing the centralized packaging station.

5. The final assembly workshop material supply system according to claim 1, characterized in that, The line-side sub-assembly station and the centralized sub-assembly station are configured to directly load the sub-assemblies onto the material cart.

6. The final assembly workshop material supply system according to claim 1, characterized in that, The material trolley is equipped with a material box for carrying the sub-assemblies.

7. The final assembly workshop material supply system according to claim 6, characterized in that, The material boxes are configured in multiple ways, and each material box is used to carry different types of sub-assemblies.

8. The final assembly workshop material supply system according to claim 6, characterized in that, The inner wall of the material box is provided with a protective layer, which is used to reduce contact wear between the sub-assemblies and the inner wall of the material box.

9. The final assembly workshop material supply system according to claim 6, characterized in that, A limiting part is provided at the periphery of the opening of the material box, and the limiting part is used to prevent the sub-assembly from coming out of the opening of the material box.

10. The final assembly workshop material supply system according to claim 6, characterized in that, The material box and the material cart are detachably connected.

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