Modularized carriage structure

Abstract

The utility model discloses a modular carriage structure which comprises a modular bottom plate, modular side walls are detachably installed on the two sides of the top end of the modular bottom plate, a modular top cover is detachably installed between the top ends of the two modular side walls, a front sealing cover is detachably installed on one side of the modular top cover, and a rear sealing cover is detachably installed on the other side of the modular top cover. A rear sealing cover is detachably installed on the other side of the modular top cover, and a modular front wall is fixed to one end of the modular bottom plate, one end of the two modular side walls and one end of the front sealing cover. The utility model has the following effects: the flexibility is enhanced: the carriage can be flexibly adjusted according to the size and the type of goods through the detachable installation of the modules such as the modular bottom plate, the modular side walls and the modular top cover, so as to adapt to different transportation requirements; and the cost is reduced: standard modules such as the modular bottom plate and the modular side walls are used, so that scale economy can be realized in production, and the production cost is reduced. In addition, the universality and the reusability of the module also reduce the maintenance and replacement cost.

Description

Technical Field

[0001] This utility model relates to the field of logistics technology, and in particular to a modular vehicle body structure. Background Technology

[0002] With the development of the logistics and transportation industry, higher demands are being placed on the flexibility and adaptability of truck bed design. Traditional truck bed structures are often optimized for specific cargo types or transportation needs, which results in several significant shortcomings when facing diverse and changing transportation demands: 1. Existing truck bed designs are usually fixed structures, unable to be quickly adjusted according to different cargo sizes, types, or transportation conditions. This lack of flexibility leads to reduced transportation efficiency, as vehicles may require multiple truck beds specifically designed for different cargo or complex modifications; 2. To adapt to diverse cargo transportation needs, manufacturers may need to produce multiple truck bed types, which not only increases production costs but also incurs additional expenses in inventory management and maintenance. Furthermore, the assembly and disassembly of traditional truck beds often requires complex tools and lengthy operation times, further reducing transportation efficiency; 3. The demands of the modern market for logistics services change rapidly, and the transportation needs of seasonal and special cargo require truck beds to be able to quickly adapt to market changes. Traditional non-modular designs are inadequate when faced with such demands; 4. Fixed-structure carriages cannot make full use of space when carrying cargo because they cannot adjust the internal layout according to actual needs, resulting in low space utilization efficiency, especially when transporting goods with irregular or varying volumes. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a modular carriage structure.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A modular carriage structure includes a modular floor, modular sidewalls detachably mounted on both sides of the top of the modular floor, a modular top cover detachably mounted between the tops of the two modular sidewalls, a front cover detachably mounted on one side of the modular top cover, and a rear cover detachably mounted on the other side of the modular top cover. A modular front wall is fixed to one end of the modular floor, the two modular sidewalls, and the front cover, and a modular rear wall is fixed to one end of the modular floor, the two modular sidewalls, and the rear cover.

[0006] Preferably, the modular base plate is composed of several first plates spliced ​​together. One side of each first plate has a first long leading edge and two first short leading edges, with the two first short leading edges located on either side of the first long leading edge. Both the first short leading edges and the first long leading edges have several corresponding first combined elongated holes. The other side of the first plate has a first fitting leading edge, which corresponds to the gap between the first short leading edge and the first long leading edge. The first fitting leading edge has several first combined short holes corresponding to the first combined elongated holes. The base plate also includes two side wall mounting plates, which are respectively located on the top sides of the first plate. Both side wall mounting plates have several side wall mounting holes that penetrate through them.

[0007] Preferably, the modular sidewall is composed of several second plates spliced ​​together. A top cover mounting hole is provided on the upper part of the sidewall of the second plate. A second long front edge and two second short front edges are provided on one side of the top cover mounting hole. The two second short front edges are located on both sides of the second long front edge. Several corresponding second combined long holes are provided on both the second long front edge and the second short front edge. A second fitting front edge is provided on the other side of the second plate. The second fitting front edge corresponds to the gap between the second long front edge and the second short front edge. Several second combined short holes corresponding to the second combined long holes are provided on the second fitting front edge. It also includes bottom plate mounting protrusions provided on both sides of the bottom end of the second plate. Several bottom plate mounting holes corresponding to the sidewall mounting holes are provided on the bottom plate mounting protrusions.

[0008] Preferably, the modular top cover is composed of several third plates. Each third plate has a first fitting strip at both its upper and lower ends, forming a first fitting groove between two first fitting strips. Each end of one of the two first fitting strips has a first assembly groove. Several first fixing holes corresponding to the top cover mounting holes are provided through the third plate. A first insert corresponding to the first fitting groove is provided on the other side of the third plate. Each end of the first insert has a first assembly block corresponding to the first assembly groove. The front cover includes a fourth plate with a second fixing hole. Second fitting strips are provided at both the upper and lower ends of one side of the fourth plate, forming a second fitting groove matching the first insert. Each end of the second fitting groove has a second assembly groove matching the first assembly block. The rear cover includes a fifth plate with a third fixing hole. A second insert corresponding to the first fitting groove is provided on one side of the fifth plate, and second assembly blocks corresponding to the first assembly groove are provided on both sides of the second insert.

[0009] Preferably, the modular front wall includes a sixth plate, which is composed of a left side wall, a right side wall, a front side wall, and a bottom side wall. The left side wall and the right side wall of the sixth plate are each provided with a third long leading edge portion and a third short leading edge portion. The third long leading edge portion and the third short leading edge portion are provided with a plurality of third combined long holes corresponding to the second combined short holes. The left side wall and the right side wall of the sixth plate are provided with fourth fixing holes corresponding to the second fixing holes. The bottom side wall of the sixth plate is provided with a bottom long leading edge portion and two bottom end leading edges portions. The two bottom end leading edges portions are located on both sides of the bottom long leading edge portion. The bottom end leading edge portion and the bottom long leading edge portion are provided with first bottom fixing holes corresponding to the first combined short holes. The gap between the bottom end leading edge portion and the first bottom fixing hole corresponds to the first fitting leading edge portion.

[0010] Preferably, the modular rear wall includes a seventh plate, which is composed of a rear side wall, a left side wall, a right side wall, and a bottom side wall. An opening is provided on the rear side wall of the seventh plate, and a carriage door is installed at the opening. A fourth short leading edge portion is provided on both the left and right side walls of the seventh plate, corresponding to the gap between the second short leading edge portion and the second combined long hole. A fourth combined short hole corresponding to the second combined long hole is provided through the fourth short leading edge portion. A bottom leading edge portion corresponding to the gap between the first long leading edge portion and the first short leading edge portion is provided on the bottom leading edge portion. A second bottom fixing hole corresponding to the first combined long hole is provided on the bottom leading edge portion. A fifth fixing hole corresponding to the third fixing hole is provided on both the left and right side walls of the seventh plate.

[0011] This utility model has the following beneficial effects:

[0012] 1. Enhanced Flexibility: Through the detachable installation of modular floor, modular side walls, modular roof and other modules, the carriage can be flexibly adjusted according to the size and type of goods to adapt to different transportation needs.

[0013] 2. Cost Reduction: Using standardized modules such as modular base plates and modular sidewalls enables economies of scale in production, reducing production costs. Furthermore, the versatility and reusability of the modules also reduce maintenance and replacement costs.

[0014] 3. Adaptability to market changes: The detachable nature of components such as the modular front and rear walls allows for rapid adjustment of the carriage configuration to adapt to changes in market demand, accommodating the transportation of seasonal or special goods.

[0015] 4. Improved space utilization: By adjusting the combination of modular floor and modular side walls, the interior space of the carriage can be effectively utilized to accommodate goods of different shapes and sizes, thereby improving the efficiency of space utilization.

[0016] 5. Easy maintenance: When a module, such as the modular top cover or front cover, is damaged, the damaged module can be replaced individually without replacing the entire carriage structure, which reduces maintenance costs and time. Attached Figure Description

[0017] Figure 1 This is one of the overall structural schematic diagrams of this utility model;

[0018] Figure 2 This is the second schematic diagram of the overall structure of this utility model;

[0019] Figure 3 This is a schematic diagram of a modular base plate structure;

[0020] Figure 4 This is a schematic diagram of the first plate structure;

[0021] Figure 5 This is a schematic diagram of a modular sidewall structure;

[0022] Figure 6 This is a schematic diagram of the second plate structure;

[0023] Figure 7 This is a structural diagram showing the modular top cover, front cover, and rear cover combined in the form of an assembly.

[0024] Figure 8 This is one of the schematic diagrams of the third plate structure;

[0025] Figure 9 This is the second schematic diagram of the third plate structure;

[0026] Figure 10 This is a schematic diagram of the fourth plate structure;

[0027] Figure 11 This is a schematic diagram of the fifth plate structure;

[0028] Figure 12 This is a schematic diagram of the modular front wall structure;

[0029] Figure 13 This is one of the schematic diagrams of a modular rear wall structure;

[0030] Figure 14 This is the second schematic diagram of the modular rear wall structure;

[0031] In the picture:

[0032] 1. Modular base plate; 101. First plate body; 102. First long leading edge portion; 103. First short leading edge portion; 104. First combined long hole; 105. Side wall mounting plate; 106. Side wall mounting hole; 107. First fitting leading edge portion; 108. First combined short hole;

[0033] 2. Modular sidewall; 201. Second plate; 202. Top cover mounting hole; 203. Second long leading edge; 204. Second short leading edge; 205. Second combined long hole; 206. Bottom plate mounting protrusion; 207. Bottom plate mounting hole; 208. Second fitting leading edge; 209. Second combined short hole;

[0034] 3. Modular top cover; 301. Third plate; 302. First fitting strip; 303. First fitting groove; 304. First assembly groove; 305. First fixing hole; 306. First insert; 307. First assembly block;

[0035] 4. Front cover; 401. Fourth plate; 402. Second fixing hole; 403. Second fitting strip; 404. Second fitting groove; 405. Second assembly groove;

[0036] 5. Rear cover; 501. Fifth plate; 502. Third fixing hole; 503. Second insert; 504. Second assembly block;

[0037] 6. Modular front wall; 601. Sixth plate; 602. Third long leading edge; 603. Third short leading edge; 604. Third combined long hole; 605. Fourth fixing hole; 606. Bottom long leading edge; 607. First bottom leading edge; 608. First bottom fixing hole;

[0038] 7. Modular rear wall; 701. Seventh panel; 702. Opening; 703. Car door; 704. Fourth short front edge; 705. Fourth combined short hole; 706. Second bottom front edge; 707. Second bottom fixing hole; 708. Fifth fixing hole. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0040] Reference Figure 1-14 A modular carriage structure includes a modular floor 1, modular side walls 2 detachably mounted on both sides of the top of the modular floor 1, a modular top cover 3 detachably mounted between the tops of the two modular side walls 2, a front cover 4 detachably mounted on one side of the modular top cover 3, a rear cover 5 detachably mounted on the other side of the modular top cover 3, a modular front wall 6 fixed to one end of the modular floor 1, the two modular side walls 2 and the front cover 4, and a modular rear wall 7 fixed to one end of the modular floor 1, the two modular side walls 2 and the rear cover 5.

[0041] In this embodiment, the combination of modular base plate 1, modular side wall 2, modular top cover 3, front cover 4, rear cover 5, modular front wall 6, and modular rear wall 7 achieves the flexibility of the carriage, allowing the size and layout of the carriage to be adjusted according to specific cargo and transportation needs, thereby improving transportation efficiency and reducing production and maintenance costs.

[0042] In this utility model, the modular base plate 1 is assembled from several first plates 101. One side of each first plate 101 is provided with a first long front edge portion 102 and two first short front edge portions 103. The two first short front edge portions 103 are located on both sides of the first long front edge portion 102. Both the first short front edge portion 103 and the first long front edge portion 102 are provided with several corresponding first combined elongated holes 104. The other side of the first plate 101 is provided with a first fitting front edge portion 107, which corresponds to the gap between the first short front edge portion 103 and the first long front edge portion 102. The first fitting front edge portion 107 is provided with several first combined short holes 108 corresponding to the first combined elongated holes 104. The system also includes two side wall mounting plates 105, which are respectively provided on the top sides of the first plate 101. Both side wall mounting plates 105 are provided with several side wall mounting holes 106.

[0043] In this embodiment, the modular base plate 1, through the design of the first plate body 101, the first long leading edge portion 102, the first short leading edge portion 103, the first combined long hole 104, the side wall mounting plate 105, the side wall mounting hole 106, the first fitting leading edge portion 107 and the first combined short hole 108, provides stability for base plate splicing and modular convenience, allowing the base plate to be adjusted to any size as needed.

[0044] In this utility model, the modular sidewall 2 is assembled from several second plates 201. A top cover mounting hole 202 is provided on the upper part of the sidewall of each second plate 201. A second long leading edge portion 203 and two second short leading edge portions 204 are provided on one side of the top cover mounting hole 202. The two second short leading edge portions 204 are located on both sides of the second long leading edge portion 203. Several corresponding second combined elongated holes 205 are provided on both the second long leading edge portion 203 and the second short leading edge portion 204. The second plate 20... On the other side of 1, a second fitting front edge portion 208 is provided, which corresponds to the gap between the second long front edge portion 203 and the second short front edge portion 204. A plurality of second combined short holes 209 corresponding to the second combined long holes 205 are opened on the second fitting front edge portion 208. It also includes bottom plate mounting protrusions 206 provided on both sides of the bottom end of the second plate body 201. A plurality of bottom plate mounting holes 207 corresponding to the side wall mounting holes 106 are opened on the bottom plate mounting protrusions 206.

[0045] In this embodiment, the precise design of the modular sidewall 2, including the second plate 201, the top cover mounting hole 202, the second long leading edge portion 203, the second short leading edge portion 204, the second combined long hole 205, the bottom plate mounting protrusion portion 206, the bottom plate mounting hole 207, the second fitting leading edge portion 208, and the second combined short hole 209, ensures a stable connection between the sidewall and the bottom plate and the top cover, thereby improving the structural strength of the carriage and the ease of assembly.

[0046] In this utility model, the modular top cover 3 is assembled from several third plates 301. Each third plate 301 has a first fitting strip 302 at both its upper and lower ends on one side, forming a first fitting groove 303 between two first fitting strips 302. Each end of each first fitting strip 302 has a first assembly groove 304. Several first fixing holes 305 corresponding to the top cover mounting holes 202 are provided through the third plate 301. The other side of the third plate 301 has a first insert strip 306 corresponding to the first fitting groove 303, and each end of the first insert strip 306 has a first assembly block 307 corresponding to the first assembly groove 304. The front cover 4 includes a fourth plate. 401, the fourth plate 401 is provided with a second fixing hole 402, and the upper and lower ends of one side of the fourth plate 401 are provided with second fitting strips 403, and the two second fitting strips 403 form a second fitting groove 404 that matches the first insert 306. The two ends of the second fitting groove 404 are provided with second assembly grooves 405 that match the first assembly block 307; the rear cover 5 includes a fifth plate 501, the fifth plate 501 is provided with a third fixing hole 502, the fifth plate 501 is provided with a second insert 503 that corresponds to the first fitting groove 303 on one side, and the second assembly block 504 that corresponds to the first assembly groove 304 is provided on both sides of the second insert 503.

[0047] In this embodiment, the modular top cover 3, through the design of the third plate 301, the first fitting strip 302, the first fitting groove 303, the first assembly groove 304, the first fixing hole 305, the first insert 306, the first assembly block 307, the fourth plate 401, the second fixing hole 402, the second fitting strip 403, the second fitting groove 404, the second assembly groove 405 of the front cover 4, and the fifth plate 501, the third fixing hole 502, the second insert 503, and the second assembly block 504 of the rear cover 5, ensures a tight connection between the top cover and the side wall and the cover, thereby improving the sealing of the carriage and the assembly efficiency.

[0048] In this invention, the modular front wall 6 includes a sixth plate 601, which is composed of a left side wall, a right side wall, a front side wall, and a bottom side wall. The left and right sides of the sixth plate 601 are each provided with a third long leading edge portion 602 and a third short leading edge portion 603. The third long leading edge portion 602 and the third short leading edge portion 603 are provided with a plurality of third combined long holes 604 corresponding to the second combined short holes 209. The left and right sides of the sixth plate 601 are provided with... The fourth fixing hole 605 corresponds to the second fixing hole 402. The bottom side wall of the sixth plate 601 is provided with a bottom long front edge portion 606 and two bottom end front edges portion 607. The two bottom end front edges portion 607 are provided on both sides of the bottom long front edge portion 606. The bottom end front edge portion 607 and the bottom long front edge portion 606 are provided with a first bottom fixing hole 608 corresponding to the first combined short hole 108. The gap between the bottom end front edge portion 607 and the first bottom fixing hole 608 corresponds to the first fitting front edge portion 107.

[0049] In this embodiment, the modular front wall 6, through the design of the sixth plate 601, the third long front edge portion 602, the third short front edge portion 603, the third combined long hole 604, the fourth fixing hole 605, the bottom long front edge portion 606, the bottom front edge portion 607, and the first bottom fixing hole 608, provides front enclosure and structural support, ensuring the connection stability between the front wall and other parts of the carriage, and supporting flexible adjustment of the modular structure.

[0050] In this utility model, the modular rear wall 7 includes a seventh plate 701, which is composed of a rear side wall, a left side wall, a right side wall, and a bottom side wall. An opening 702 is provided on the rear side wall of the seventh plate 701, and a carriage door 703 is installed at the opening 702. A fourth short front edge portion 704 is provided on both the left and right side walls of the seventh plate 701, corresponding to the gap between the second short front edge portion 204 and the second combined long hole 205. A fourth combined short hole 705 corresponding to the second combined long hole 205 is provided through the fourth short front edge portion 704. A bottom front edge portion 706 is provided on the bottom side wall of the seventh plate 701, corresponding to the gap between the first long front edge portion 102 and the first short front edge portion 103. A second bottom fixing hole 707 corresponding to the first combined long hole 104 is provided on the bottom front edge portion 706. A fifth fixing hole 708 corresponding to the third fixing hole 502 is provided on both the left and right side walls of the seventh plate 701.

[0051] In this embodiment, the modular rear wall 7, through the design of the seventh plate 701, opening 702, carriage door 703, fourth short front edge part 704, fourth combined short hole 705, bottom front edge part 706, and second bottom fixing hole 707, realizes convenient loading and unloading of goods, while ensuring a stable connection between the rear wall and other parts of the carriage, maintaining the integrity of the structure and the flexibility of modularity.

[0052] The assembly process of this modular carriage begins with the assembly of the modular floor 1. First, multiple first panels 101 are connected using bolts and nuts through the first combined elongated holes 104 and the first combined short holes 108 to ensure the stability and integrity of the floor 1. Next, the side wall mounting plates 105 are fixed to the top of the first panels, aligned with the floor mounting holes 207 on the floor mounting flange 206 through the side wall mounting holes 106, and secured using bolts and nuts.

[0053] Next, install the modular sidewalls 2. Each sidewall is composed of several second plates 201 spliced ​​together and connected to both sides of the base plate via second combined elongated holes 205 and second combined short holes 209, using bolts and nuts. Ensure the connection points between the sidewalls and the base plate are secure, while also taking into account the alignment and gaps between the sidewalls.

[0054] Then, the modular top cover 3 is installed on the top of the two side walls: the top cover is composed of a third plate 301, which is aligned with the top cover mounting hole 202 through the first fixing hole 305 and fixed with bolts and nuts. Care should be taken to ensure that the first fitting strip 302 and the first fitting groove 303 are properly fitted to enhance the stability of the connection.

[0055] Next, install the front cover 4 and the rear cover 5. The front cover is connected to the fourth fixing hole 605 through the second fixing hole 402 on the fourth plate 401, and the rear cover is connected to the fifth fixing hole 708 through the third fixing hole 502 on the fifth plate 501. Use bolts and nuts to ensure a firm connection between these covers and the top cover.

[0056] Finally, the modular front wall 6 and modular rear wall 7 are installed. The front wall is composed of a sixth plate 601, which is connected to the base plate and side wall through the third combined long hole 604 and the first bottom fixing hole 608, etc. The rear wall is composed of a seventh plate 701, which is connected to the base plate and side wall through the fourth combined short hole 705 and the second bottom fixing hole 707, etc., to ensure that the carriage door 703 is installed at the opening 702 and fixed with bolts. The entire process uses bolts and nuts to ensure a tight connection between each module.

[0057] This assembly method not only provides structural stability but also allows for rapid adjustments to the configuration of the carriages according to actual needs, improving assembly and maintenance efficiency. The use of standardized bolt connections ensures the flexibility and practicality of the modular carriage structure, while also facilitating future expansion and modifications.

[0058] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A modular carriage structure, characterized in that, The system includes a modular base plate (1), on which modular sidewalls (2) are detachably installed on both sides of the top of the modular base plate (1), and a modular top cover (3) is detachably installed between the tops of the two modular sidewalls (2). A front cover (4) is detachably installed on one side of the modular top cover (3), and a rear cover (5) is detachably installed on the other side of the modular top cover (3). A modular front wall (6) is fixed to one end of the modular base plate (1), the two modular sidewalls (2) and the front cover (4), and a modular rear wall (7) is fixed to one end of the modular base plate (1), the two modular sidewalls (2) and the rear cover (5).

2. The modular carriage structure according to claim 1, characterized in that, The modular base plate (1) is composed of several first plates (101). One side of the first plate (101) is provided with a first long front edge (102) and two first short front edges (103). The two first short front edges (103) are located on both sides of the first long front edge (102). Both the first short front edge (103) and the first long front edge (102) are provided with several corresponding first combined long holes (104). The other side of the first plate (101) is provided with a first fitting front edge (107). The first fitting front edge (107) corresponds to the gap between the first short front edge (103) and the first long front edge (102). The first fitting front edge (107) is provided with several first combined short holes (108) corresponding to the first combined long holes (104). It also includes two side wall mounting plates (105), which are respectively disposed on the top sides of the first plate (101), and each of the two side wall mounting plates (105) has a plurality of side wall mounting holes (106) through it.

3. The modular carriage structure according to claim 1, characterized in that, The modular sidewall (2) is assembled from several second plates (201). A top cover mounting hole (202) is provided on the upper sidewall of the second plate (201). A second long front edge (203) and two second short front edges (204) are provided on one side of the top cover mounting hole (202). The two second short front edges (204) are provided on both sides of the second long front edge (203). Several corresponding second combined long holes (205) are provided on both the second long front edge (203) and the second short front edge (204). A second fitting front edge (208) is provided on the other side of the second plate (201). The second fitting front edge (208) corresponds to the gap between the second long front edge (203) and the second short front edge (204). Several second combined short holes (209) corresponding to the second combined long holes (205) are provided on the second fitting front edge (208). It also includes bottom plate mounting protrusions (206) provided on both sides of the bottom end of the second plate (201), and the bottom plate mounting protrusions (206) are provided with a plurality of bottom plate mounting holes (207) corresponding to the side wall mounting holes (106).

4. A modular carriage structure according to claim 1, characterized in that, The modular top cover (3) is assembled from several third plates (301). Each of the three third plates (301) has a first fitting strip (302) at both the top and bottom ends on one side. A first fitting groove (303) is formed between two first fitting strips (302). Each of the two first fitting strips (302) has a first assembly groove (304) at both ends. Each of the three third plates (301) has several first fixing holes (305) corresponding to the top cover mounting holes (202). Each of the three third plates (301) has a first insert (306) corresponding to the first fitting groove (303) at the other side. Each of the first insert (306) has a first assembly block (307) corresponding to the first assembly groove (304) at both ends. The front cover (4) includes a fourth plate (401), the fourth plate (401) is provided with a second fixing hole (402), and the upper and lower ends of one side of the fourth plate (401) are provided with second fitting strips (403). A second fitting groove (404) matching the first insert (306) is formed between the two second fitting strips (403). The two ends of the second fitting groove (404) are provided with second assembly grooves (405) matching the first assembly block (307). The rear cover (5) includes a fifth plate (501), a third fixing hole (502) is provided on the fifth plate (501), a second insert (503) corresponding to the first fitting groove (303) is provided on one side of the fifth plate (501), and a second assembly block (504) corresponding to the first assembly groove (304) is provided on both sides of the second insert (503).

5. A modular carriage structure according to claim 1, characterized in that, The modular front wall (6) includes a sixth plate (601), which is composed of a left side wall, a right side wall, a front side wall, and a bottom side wall. The left side wall and the right side wall of the sixth plate (601) are each provided with a third long leading edge portion (602) and a third short leading edge portion (603). The third long leading edge portion (602) and the third short leading edge portion (603) are provided with a plurality of third combined long holes (604) corresponding to the second combined short holes (209). The left side wall and the right side wall of the sixth plate (601) are provided with holes corresponding to the second fixing holes (402). The fourth fixing hole (605) is provided on the bottom side wall of the sixth plate (601), and the bottom long front edge part (606) and two bottom end front edges (607) are provided. The two bottom end front edges (607) are provided on both sides of the bottom long front edge part (606). The bottom end front edge part (607) and the bottom long front edge part (606) are provided with a first bottom fixing hole (608) corresponding to the first combined short hole (108). The gap between the bottom end front edge part (607) and the first bottom fixing hole (608) corresponds to the first fitting front edge part (107).

6. A modular carriage structure according to claim 1, characterized in that, The modular rear wall (7) includes a seventh plate (701), which is composed of a rear side wall, a left side wall, a right side wall, and a bottom side wall. An opening (702) is provided on the rear side wall of the seventh plate (701), and a carriage door (703) is installed at the opening (702). A fourth short front end (704) is provided on both the left and right side walls of the seventh plate (701) and corresponds to the gap between the second short front end (204) and the second combined elongated hole (205). The fourth short front end (704) has a through-hole. A fourth combination short hole (705) corresponding to the second combination long hole (205) is provided. A bottom front end portion (706) corresponding to the gap between the first long front end portion (102) and the first short front end portion (103) is provided on the bottom side wall of the seventh plate (701). A second bottom fixing hole (707) corresponding to the first combination long hole (104) is provided on the bottom front end portion (706). A fifth fixing hole (708) corresponding to the third fixing hole (502) is provided on both the left and right side walls of the seventh plate (701).

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