Bottom frame structure of aluminum alloy container
By optimizing the cross-sectional structure and modular design of the bottom frame of the aluminum alloy cargo box, combined with reinforcement ribs and welding connections, the stability and durability of the bottom frame of the aluminum alloy cargo box under heavy load conditions is solved, and the balance between lightweight and high strength is achieved, reducing production costs.
Patent Information
- Application Number
- CN202422513740.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-17
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-10-17
AI Technical Summary
The existing aluminum alloy cargo box bottom frame has poor stability and durability under heavy load conditions. Traditional enhancement methods lead to increased weight or complex manufacturing and high cost, making it difficult to achieve a balance between lightweight and high strength.
The optimized sectional structure of the bottom frame edge beam and horizontal beam, combined with the modular design and reinforced rib structure, is made through the aluminum alloy extrusion molding process to form a stable frame and be welded and bolted to meet the needs of cargo boxes of different specifications.
While maintaining lightweight, it improves load-bearing capacity by more than 30%, reduces production costs and improves the bending and corrosion resistance of the structure. It is suitable for light truck cargo container design.
Smart Images
Figure CN223116469U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cargo boxes, and more specifically, to an aluminum alloy cargo box bottom frame structure. Background Art
[0002] With the rapid development of the modern logistics and transportation industry, the requirements for truck cargo boxes are gradually shifting from the traditional high load-bearing capacity to the direction of lightweight, high strength, and long life. Especially in the field of bulk cargo transportation, the self-weight of trucks directly affects their transportation efficiency, fuel consumption, and carbon emissions. Traditional truck cargo boxes usually use steel as the main material. Although it has high strength, it has a large self-weight, resulting in increased fuel consumption during transportation. Moreover, steel is prone to rust and has poor corrosion resistance, with a limited service life. Therefore, using lighter and more durable materials to manufacture truck cargo boxes has become a research hotspot.
[0003] In this context, aluminum alloy materials have gradually become an important choice in lightweight cargo box design due to their low density, high strength, good corrosion resistance, and recyclability. Aluminum alloy can not only effectively reduce the vehicle body weight and improve fuel economy in cargo box manufacturing but also maintain good corrosion resistance during long-term use, extending the service life of the cargo box. However, compared with steel, aluminum alloy materials have relatively lower hardness and bending resistance, which makes the aluminum alloy cargo boxes in traditional design schemes prone to deformation or failure in actual applications. Especially under heavy-duty transportation conditions, the stability and durability of the aluminum alloy cargo box bottom frame perform poorly.
[0004] In the prior art, in order to enhance the strength and stability of aluminum alloy cargo boxes, the following several methods are usually used for improvement:
[0005] (1) Increasing the material thickness: By increasing the thickness of the aluminum alloy material to improve the bending resistance and load-bearing capacity of the overall structure. However, this method will increase the self-weight of the cargo box, contrary to the original intention of lightweight design, and the processing cost also rises accordingly.
[0006] (2) Using composite materials or reinforcing materials: Using composite materials or combining aluminum alloy with other materials (such as carbon fiber) to form a composite structure of multiple materials. However, the manufacturing process of composite materials is complex, the cost is high, and it is difficult to achieve mass production, which is not conducive to the popularization and application of the cargo box bottom frame structure.
[0007] (3) Adopting complex internal and external support structures: By adding complex internal and external support structures in the aluminum alloy cargo box, such as adding internal ribs or external brackets to improve the structural strength. Although this method can improve the load-bearing capacity, its manufacturing process is complex, the installation difficulty is large, and it increases the volume of the internal structure of the cargo box, reducing the effective payload space for goods.
[0008] Therefore, in view of the contradictory relationship among weight, strength, and cost in the existing aluminum alloy cargo box bottom frame structure, there is an urgent need for a new aluminum alloy cargo box bottom frame structure that can take into account lightweight and high strength, with a simple structure and low manufacturing cost, to solve the deficiencies of the existing technology. Summary of the Invention
[0009] To solve the above problems, the present invention provides an aluminum alloy cargo box bottom frame structure. By optimizing the cross-sectional structures of the bottom frame side beams and the transverse and longitudinal beams, and adopting modular design and rib structures, it has stronger load-bearing capacity while maintaining low weight, and can effectively improve the service performance of the cargo box under heavy load conditions.
[0010] To achieve the above object, the present invention provides the following technical solutions, mainly including:
[0011] An aluminum alloy cargo box bottom frame structure, specifically including the following structures:
[0012] Cargo box floor: Made of aluminum alloy by extrusion molding process, with anti-slip stripe structures on its surface, which increases the stability of the goods during transportation.
[0013] Bottom frame side beam assembly: Includes a front frame, a rear frame, a left frame, and a right frame. The four frames are positioned and connected by frame reinforcement blocks and assembled by welding or bolt fastening methods to form a stable frame structure, improving the overall strength of the cargo box.
[0014] Bottom frame transverse and longitudinal beam assembly: Includes several cross beams, two longitudinal beams, and several transverse and longitudinal beam connectors. The cross beams and longitudinal beams are connected by connectors to form an overall bottom frame structure that supports the cargo box floor. This structure improves the bending resistance of the cross beams and longitudinal beams through rib design and can disperse the load in the overall bottom frame structure.
[0015] From the above technical solutions, it can be seen that compared with the existing technology, the present invention can effectively improve the overall load-bearing capacity of the cargo box while maintaining lightweight, and since the key components all adopt aluminum alloy extrusion molding process, the production mold cost is greatly reduced, thus reducing the production cost on the basis of meeting the strength requirements. Brief Description of the Drawings
[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.
[0017] Figure 1 This is a three-dimensional structure diagram of the present utility model.
[0018] Figure 2 This is a cross-sectional view of the aluminum alloy cargo box bottom frame structure of the present utility model.
[0019] Figure 3 This is a detailed view of the bottom frame side beam assembly of the present utility model.
[0020] Figure 4 This is a schematic diagram of the internal structure of the bottom frame cross and longitudinal beam assembly of the present utility model.
[0021] Explanation of reference numerals in the drawings: 1 - fixed seat, 2 - rotating frame, 3 - sliding frame, 4 - cross link, 401 - sliding head, 5 - support plate, 501 - first sliding groove, 502 - second sliding groove, 503 - limiting tooth, 6 - mounting slider, 601 - limiting bolt. Specific implementation manners
[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0023] Embodiment 1
[0024] As Figures 1 to 4 shown, a manufacturing method and its assembly process of a specific aluminum alloy cargo box bottom frame structure. The cargo box bottom frame structure mainly consists of three parts: a cargo box floor 1, a bottom frame side beam assembly 2, and a bottom frame cross and longitudinal beam assembly 3. It is assembled by a modular splicing method, and the overall bending strength and load-bearing capacity are improved by optimizing the cross-sectional structure of the components and adopting a rib design.
[0025] Specific structural composition:
[0026] Cargo box floor 1
[0027] Material selection: The cargo box floor 1 is made of 6061-T6 high-strength aluminum alloy material, which has excellent mechanical properties and corrosion resistance. It is made by an aluminum alloy extrusion molding process, with a light overall weight and high surface hardness.
[0028] Anti-slip design: A number of anti-slip stripe structures are evenly distributed on the floor surface along the length direction. The stripe width is 10 mm, and the stripe spacing is 15 mm. This anti-slip design can effectively increase the friction between the goods and the floor surface and prevent the goods from sliding during transportation.
[0029] Dimension parameters: The overall length of the floor is 6000 mm, the width is 2500 mm, and the thickness is 3 mm. Aluminum alloy floors of different sizes can be customized according to the actual cargo box specifications.
[0030] Bottom frame side beam assembly 2
[0031] It includes a front frame 4, a rear frame 7, a left frame 6, and a right frame 8: The four frames of the bottom frame side beam assembly 2 are all designed with a multi-chamber structure and are made of aluminum alloy material through an extrusion process. Its cross-sectional structure contains two main chambers and three secondary chambers. The main chambers are used to bear the main stress of the cargo box, and the secondary chambers are used to increase the overall stiffness.
[0032] Frame reinforcement block 5: Frame reinforcement blocks are provided at each frame connection. The frame reinforcement block 5 is formed by casting high-strength aluminum alloy, with a thickness of 15 mm, a length and width of 80 mm × 50 mm, and several reinforcing ribs are added on the surface of the reinforcement block to improve the bending and torsional resistance of the connection.
[0033] Welding process: The four frames are positioned and welded through the frame reinforcement blocks. TIG tungsten inert gas arc welding process is used for welding, and the weld thickness is 3 mm to ensure the firm connection of the overall side beam assembly.
[0034] Bottom frame cross and longitudinal beam assembly 3
[0035] Cross beam 9: The cross beam 9 in the bottom frame is made of aluminum alloy material and is formed into a "U" - shaped cross - section structure through a cold drawing process. The cross - section size is 50 mm × 70 mm, and the thickness is 2 mm. The number of cross beams 9 is 5, and they are evenly distributed along the width direction of the cargo box floor to support the cargo box floor.
[0036] Longitudinal beam 11: The longitudinal beam 11 is designed with an "I" - shaped cross - section, with a cross - section size of 100 mm × 150 mm and a thickness of 3 mm. The longitudinal beam 11 is arranged along the length direction of the cargo box bottom frame and is fixed to each cross beam 9 through the cross - longitudinal beam connection frame 10.
[0037] Cross - longitudinal beam connection frame 10: The cross - longitudinal beam connection frame 10 adopts a modular design. Each connection frame is provided with multiple reinforcing ribs to improve the connection strength between the cross beam 9 and the longitudinal beam 11. The overall connection frame is formed by aluminum alloy in one - step molding process, with a length of 120 mm, a height of 70 mm, and a width of 60 mm.
[0038] Assembly steps
[0039] Assembly of the side beam assembly
[0040] 1.1 Position the front frame 4, rear frame 7, left frame 6, and right frame 8 in sequence through the frame reinforcement block 5 to ensure that the four frames form a complete rectangular frame.
[0041] 1.2 Fix the frame using fixtures and weld the frame and the frame reinforcement block with TIG welding process. During welding, the weld seams should be evenly distributed to ensure no welding defects such as cracks and pores at the welded joints.
[0042] Assembly of the crossbeam and longitudinal beam assembly
[0043] 2.1 Place two longitudinal beams 11 parallel on the ground with a longitudinal beam spacing of 2200 mm, and sequentially install the crossbeam and longitudinal beam connecting brackets 10 on the longitudinal beams.
[0044] 2.2 Snap and fix each crossbeam 9 with the crossbeam and longitudinal beam connecting bracket 10, and tighten with bolt connectors to ensure that each connection point has high structural strength.
[0045] 2.3 After the connection between the crossbeam 9 and the longitudinal beam 11 is completed, check the perpendicularity and levelness of each connection to ensure the flatness of the overall structure of the crossbeam and longitudinal beam assembly.
[0046] Connection between the floor and the bottom frame structure
[0047] 3.1 Place the cargo box floor 1 stably on the bottom frame crossbeam and longitudinal beam assembly 3, and adjust the position of the floor so that it is completely aligned with the four frames of the side beam assembly 2.
[0048] 3.2 Use bolts and gaskets to fixedly connect the cargo box floor to the crossbeam 9 and the longitudinal beam 11. The bolt specification for each fixed point is M12, and the gasket diameter is 20 mm to reduce the stress concentration between the aluminum alloy and the bolt.
[0049] 3.3 Check the tightness of the overall assembly to ensure that each bolt is tightened in place. Finally, apply an anti-corrosion coating to the surface of all bolts to improve the durability of the cargo box bottom frame structure.
[0050] Structure optimization and improvement
[0051] Section optimization: In the specific implementation, by optimizing the cross-sectional shapes of the crossbeam 9 and the longitudinal beam 11, such as adopting an arc reinforcement structure or adding a secondary cavity design, the bending resistance and structural stability of the aluminum alloy material are further improved.
[0052] Modular design: The crossbeam and longitudinal beam connecting bracket 10 in this embodiment adopts a modular design, which can be adjusted according to different sizes and load requirements of the cargo box, so as to be applicable to different specifications of the cargo box bottom frame structure.
[0053] Anti-corrosion treatment: After the assembly of the cargo box bottom frame structure is completed, perform surface anodizing treatment on the entire bottom frame assembly, and spray an anti-corrosion coating at the welded joints, so as to improve the corrosion resistance of the bottom frame structure and extend the service life.
[0054] In summary, while ensuring lightweight, the aluminum alloy cargo box bottom frame structure provided in this embodiment has a load-bearing capacity increased by more than 30%. Moreover, since the key components all adopt the aluminum alloy extrusion molding process, the product mold cost is significantly reduced. The modular design makes its assembly process more convenient and can adapt to the specification requirements of different trucks, thus having a wide application prospect in the field of logistics transportation.
[0055] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple. For the relevant parts, reference can be made to the description in the method part.
[0056] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. An aluminum alloy cargo box bottom frame structure, comprising a cargo box floor (1), a bottom frame side beam assembly (2), and a bottom frame transverse and longitudinal beam assembly (3), characterized in that: The bottom frame side beam assembly (2) includes a front frame (4), a rear frame (7), a left frame (6) and a right frame (8). The front frame (4), the rear frame (7), the left frame (6) and the right frame (8) are positioned and welded together through frame strengthening blocks (5). The bottom frame cross and longitudinal beam assembly (3) includes a number of cross beams (9), two longitudinal beams (11) and a number of cross and longitudinal beam connecting brackets (10). The cross beams (9) and the longitudinal beams (11) are connected through the cross and longitudinal beam connecting brackets (10) to form a bottom frame structure.
2. The aluminum alloy cargo box bottom frame structure according to claim 1, characterized in that: The surface of the cargo box floor (1) is provided with a plurality of anti-slip stripe structures. The anti-slip stripes are evenly distributed along the length direction of the cargo box floor (1) to increase the stability of the goods on the cargo box floor.
3. The aluminum alloy cargo box bottom frame structure according to claim 1, characterized in that: The bottom frame side beam assembly (2) is positioned and connected through the frame strengthening blocks (5), and is combined by welding or bolt fastening to improve the overall strength of the bottom frame and the reliability of the connection.
4. The aluminum alloy cargo box bottom frame structure according to claim 1, characterized in that: The front frame (4), the rear frame (7), the left frame (6) and the right frame (8) are all made of aluminum alloy material, and their cross-sectional structures are optimized to form a multi-cavity structure, thereby improving the bending strength and overall load-bearing capacity of the side beams.
5. The aluminum alloy cargo box bottom frame structure according to claim 1, wherein: The longitudinal beams (11) and the cross beams (9) in the bottom frame cross and longitudinal beam assembly (3) are both made by aluminum alloy extrusion molding process, and the cross-sectional shapes of the longitudinal beams (11) and the cross beams (9) are "I" shape and "U" shape respectively to achieve the dual effects of weight reduction and strength improvement.
6. The aluminum alloy cargo box bottom frame structure according to claim 1, characterized in that: The cross and longitudinal beam connecting bracket (10) has a number of reinforcing rib structures. The reinforcing ribs are evenly distributed along the length direction of the connecting bracket (10) and are closely attached to the cross beam (9) and the longitudinal beam (11), thereby enhancing the stability of the connection between the cross beam (9) and the longitudinal beam (11) and the overall load-bearing performance.
7. The aluminum alloy cargo box bottom frame structure according to claim 1, wherein: The cross and longitudinal beam connecting bracket (10) between the cross beam (9) and the longitudinal beam (11) in the bottom frame cross and longitudinal beam assembly (3) adopts a modular design and can be flexibly adjusted and assembled according to the cargo box size and load requirements to adapt to the bottom frame structure design of different specifications of cargo boxes.
8. The aluminum alloy cargo box bottom frame structure according to claim 1, wherein: The bottom frame side beam assembly (2) and the bottom frame cross and longitudinal beam assembly (3) are connected through a connection bolt and gasket assembly. Among them, the gasket is arranged between the bolt and the aluminum alloy component to reduce the local stress concentration phenomenon caused by excessive tightening force on the aluminum alloy component.
9. The aluminum alloy cargo box bottom frame structure according to any one of claims 1 to 8, characterized in that: All key components of the aluminum alloy cargo box bottom frame structure adopt the aluminum alloy extrusion molding process and are subjected to surface treatment after welding or screwing.