A composite connection structure for cargo box assembly

Abstract

This utility model discloses a composite connection structure for cargo box assembly, comprising: a multi-layer composite panel, the composite panel including a honeycomb core layer and an outer skin layer covering the honeycomb core layer; a bending groove is formed in the composite panel along a first direction, so that the composite panel has a bending path along a second direction; the composite panel is bent and closed along the second direction to form a cargo box body, the inner side of the cargo box body is covered with a welded skin layer, and the cargo box body is welded to a reinforcing layer through the welded skin layer. In this utility model, the multi-layer composite panel uses a honeycomb core layer covered with an outer skin layer of the same material to form a sandwich structure. The composite panel can be bent and closed along the second direction and softened by heating to form a cargo box body; the inner side of the cargo box body is covered with a welded skin layer, and the cargo box body is welded to the reinforcing layer through the welded skin layer using a hot welding machine. This effectively reduces its own weight and manufacturing cost while meeting the load-bearing strength requirements, and effectively improves its service life and sealing and waterproof performance.

Description

Technical Field

[0001] This utility model relates to the field of cargo box technology, specifically to a cargo box assembly composite connection structure. Background Technology

[0002] All-steel cargo boxes boast high structural strength, capable of stably supporting goods with densities up to 1.5 t / m³, such as steel and stone. The rigidity and deformation resistance of steel effectively withstand wear and tear during long-term loading, unloading, and transportation, with a wear resistance coefficient far exceeding that of ordinary alloys or non-metallic materials. However, all-steel cargo boxes are relatively heavy. For new energy freight vehicles, this increased weight directly increases energy consumption and shortens the transport distance per charge. Composite cargo boxes, on the other hand, overcome the shortcomings of all-steel boxes. Their internal core material possesses excellent cushioning properties, effectively absorbing vibrations and reducing collision damage between goods and the cargo box walls. Furthermore, the density of composite materials is significantly lower than that of steel, significantly reducing the cargo box's weight. This not only helps improve the vehicle's effective load-bearing efficiency but also saves energy for new energy vehicles.

[0003] However, the common installation method for composite cargo boxes currently uses F-shaped aluminum profiles for splicing and fixing. This installation method not only requires precise positioning of the aluminum profiles, but also requires rivets to be driven point by point to complete the connection, which leads to a long overall installation time and low efficiency. In addition, the sealing at the rivet holes is poor, and gaps are prone to appear after long-term use, which can easily cause water leakage problems. Utility Model Content

[0004] The purpose of this utility model is to provide a composite connection structure for cargo box assembly in order to solve the above problems.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution, including: A multi-layer composite panel, wherein the composite panel includes a honeycomb core layer and an outer skin layer is wrapped around the honeycomb core layer; The composite panel has a bending groove along the first direction, so that the composite panel has a bending path along the second direction; The composite panel is bent and enclosed along the second direction to form a cargo box body. The inside of the cargo box body is covered with a welded skin layer, and the cargo box body is welded to the reinforcing plate through the welded skin layer.

[0006] As a further description of the above technical solution, the thickness of the honeycomb core layer is 5-20 mm, and the thickness of the outer skin is 5-10% of the thickness of the honeycomb core layer.

[0007] As a further description of the above technical solution, the composite panel includes a first panel and a second panel, wherein the width of the second panel is 40-60% of that of the first panel.

[0008] As a further description of the above technical solution, a bending groove is provided at the connection between adjacent first plates and second plates along the first direction.

[0009] As a further description of the above technical solution, the first plate is connected in parallel along the second direction.

[0010] As a further description of the above technical solution, a second plate is connected to the outer side of the first plate at the end.

[0011] As a further description of the above technical solution, the inclination angle of the bending groove section is 45°.

[0012] As a further description of the above technical solution, after the composite panel is bent along the bending groove, the adjacent panels are perpendicular to each other.

[0013] As a further description of the above technical solution, the bending groove of the composite panel is softened by heating and then closed to form a welded part.

[0014] As a further description of the above technical solution, a cover plate is welded to the top and / or bottom of the cargo box.

[0015] The beneficial effects of this utility model are as follows: This invention relates to a multi-layer composite panel, which uses a honeycomb core layer covered with an outer skin layer of the same material to form a sandwich structure. The composite panel has bending grooves along a first direction, allowing it to be bent and closed along a second direction and then softened by heating to form a cargo box body. The inner side of the cargo box body is covered with a welded skin layer, and the cargo box body is welded to the reinforcing layer through the welded skin layer using a hot welding machine. This design satisfies the load-bearing strength requirements while effectively reducing its own weight and manufacturing cost, and effectively improving its service life and sealing and waterproofing performance.

[0016] To more clearly illustrate the structural features and functions of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0017] Figure 1 This is a flattened schematic diagram of the composite panel in the cargo box assembly composite connection structure of this utility model; Figure 2 This is a cross-sectional schematic diagram of the composite panel in the cargo box assembly composite connection structure of this utility model; Figure 3 This is a top view of the cargo box body in the cargo box assembly composite connection structure of this utility model; Figure 4 This is a top view schematic diagram of the cargo box assembly composite connection structure of this utility model; Figure 5 yes Figure 4Enlarged view of point A in the middle; Figure 6 This is a schematic diagram of the composite connection structure for cargo box assembly of this utility model.

[0018] Figure label: 1. Composite panel; 11. Honeycomb core layer; 12. Outer skin layer; 13. Bending groove; 14. First panel; 15. Second panel; 16. Welding section; 2. Cargo compartment body; 3. Welded skin layer; 4. Reinforcing layer; 5. Cover layer. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0020] like Figures 1-6 As shown, in one embodiment, a cargo box assembly composite connection structure includes: a composite panel 1 prepared by multi-layer composite; wherein, the composite panel 1 includes a honeycomb core layer 11, and the honeycomb core layer 11 is covered with an outer skin layer 12. For example, the honeycomb core layer 11 can be made of polypropylene (PP) honeycomb panels, which are lightweight, chemically resistant, and have good thermoplasticity, making them easy to heat, bend, and weld. The upper and lower surfaces of the honeycomb core layer 11 are covered with fiberglass panels of the same material to form an outer skin layer 12. While retaining the thermoplastic properties, the fiberglass reinforcement significantly improves the wear resistance and impact resistance of the outer skin, protecting the inner honeycomb core layer 11 from damage while isolating it from external dust and moisture erosion.

[0021] In some embodiments, the thickness of the honeycomb core layer 11 is 5-20 mm. Optionally, in some embodiments, the thickness of the honeycomb core layer 11 is 5-15 mm. Optionally, in some embodiments, the thickness of the honeycomb core layer 11 is 5-10 mm. Exemplarily, the thickness of the honeycomb core layer 11 can be 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, or a range of any two of the above values.

[0022] Correspondingly, the thickness of the outer skin is 5-10% of the thickness of the honeycomb core layer 11. Optionally, in some embodiments, the thickness of the outer skin is 6-8% of the thickness of the honeycomb core layer 11. Exemplarily, the thickness of the outer skin can be 6%, 7%, 8%, 9%, 10% of the thickness of the honeycomb core layer 11, or a range consisting of any two of the above values.

[0023] It is understandable that the composite panel 1 prepared by multi-layer composite uses a honeycomb core layer 11 covered with an outer skin layer 12 of the same material to form a sandwich structure, which effectively reduces its own weight and manufacturing cost while meeting the load-bearing strength requirements, and effectively improves its service life and sealing and waterproof performance.

[0024] Specifically, the hollow structure of the honeycomb core layer 11 can effectively reduce the amount of material used. According to calculations, the self-weight of the composite panel 1 required to prepare a 6m³ cargo box is about 190 kg, which is 300 kg lighter than that of a steel box. According to calculations, the cost difference in tolls and fuel saved by the composite cargo box in ordinary trunk transportation can be recovered in six months. The same material covering structure has no splicing gaps, and after hot welding, it can form a continuous sealing surface, which has good corrosion resistance and sealing performance, avoiding the common problems of rust, corrosion and water leakage of all-steel cargo boxes, and can effectively extend the service life.

[0025] It should be explained in detail that the composite panel 1 is along the first direction ( Figure 1 A bending groove 13 is provided in the middle (Y direction), so that the composite panel 1 has a bending path along the second direction.

[0026] Specifically, the composite panel 1 is formed into multiple sets of first panels 14 and second panels 15 through bending grooves 13; wherein, the first panels 14 are along the second direction ( Figure 1 The two ends of the first plate 14 are connected in parallel (in the X direction), while a set of second plates 15 are connected to the outer side of the first plate 14 at both ends.

[0027] In some embodiments, the width of the second plate 15 is 40-60% of the width of the first plate 14. Optionally, in some embodiments, the width of the second plate 15 is 45-55% of the width of the first plate 14. Optionally, in some embodiments, the width of the second plate 15 is 48-54% of the width of the first plate 14. Exemplarily, the width of the second plate 15 is 40%, 42%, 44%, 46%, 48%, 50%, 52%, 54%, 56%, 58%, or 60% of the width of the first plate 14, or a range consisting of any two of the above values.

[0028] Furthermore, at the connection between adjacent first plates 14 and second plates 15, along the first direction ( Figure 1 (In the Y direction) A bending groove 13 is opened by the engraving equipment; specifically, the inclination angle of the bending groove section is 45°, which makes the exposed honeycomb core layer 11 section flatter after engraving, and the heating is more uniform during subsequent heating and softening, reducing bending wrinkles. Understandably, the bending groove 13 is heated before folding, so that the honeycomb core exposed at the bending groove 13 is easy to bend and form after being carved and softened by heat; and when the composite panel 1 bends along the bending groove 13, the two 45° inclined surfaces can fit perfectly to form a 90° right angle, ensuring that the cargo box 2 is square and avoiding loading difficulties or misalignment with the chassis due to the skewed corners.

[0029] Furthermore, the composite panel 1 along the second direction ( Figure 1 The composite panel 1 is bent and enclosed in the X direction to form the cargo box body 2. The bending groove 13 of the composite panel 1 is softened and closed under the heating action of the infrared heating machine to form the welded part 16. After the composite panel 1 is bent along the bending groove 13, the adjacent panels are perpendicular to each other. The empty part when the second panel 15 faces each other serves as the door frame structure.

[0030] Please continue reading. Figures 1-6 In this embodiment, the inner side of the cargo box 2 is covered with a welding layer 3 of the same material as the outer skin layer 12. Under the heating action of the hot welding machine, the cargo box 2, the welding layer 3 and the reinforcing plate 4 are welded together to form an integral whole.

[0031] Furthermore, the top and / or bottom of the cargo compartment 2 are welded with cover plates 5 of the same material, and a reinforcing plate 4 of the same material is also welded on by a hot welding machine, so that the cargo compartment 2 and the cover plates 5 form a cargo compartment as a whole.

[0032] Compared with the traditional riveting process for aluminum profiles in composite cargo boxes, this application effectively reduces its own weight and manufacturing cost while meeting the load-bearing strength requirements, and effectively improves its service life and sealing and waterproofing performance.

[0033] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A composite connection structure for cargo box assembly, characterized in that, include: A multi-layer composite panel (1) is prepared, the composite panel (1) includes a honeycomb core layer (11) and the honeycomb core layer (11) is covered with an outer skin layer (12). The composite panel (1) has a bending groove (13) along the first direction, so that the composite panel (1) has a bending path along the second direction; The composite panel (1) is bent and enclosed along the second direction to form a cargo box body (2). The cargo box body (2) is covered with a welded skin layer (3) on the inside. The cargo box body (2) is welded to the reinforcing plate (4) through the welded skin layer (3).

2. The cargo box assembly composite connection structure according to claim 1, characterized in that, The thickness of the honeycomb core layer (11) is 5-20 mm, and the thickness of the outer skin is 5-10% of the thickness of the honeycomb core layer (11).

3. The cargo box assembly composite connection structure according to claim 1, characterized in that, The composite panel (1) includes a first panel (14) and a second panel (15), wherein the width of the second panel (15) is 40-60% of that of the first panel (14).

4. The cargo box assembly composite connection structure according to claim 3, characterized in that, A bending groove (13) is provided at the connection between the adjacent first plate (14) and the second plate (15) along the first direction.

5. The cargo box assembly composite connection structure according to claim 3, characterized in that, The first plate (14) is connected in parallel along the second direction.

6. The cargo box assembly composite connection structure according to claim 3, characterized in that, A second plate (15) is connected to the outer side of the first plate (14) at the end.

7. The cargo box assembly composite connection structure according to claim 4, characterized in that, The inclination angle of the section of the bending groove (13) is 45°.

8. The cargo box assembly composite connection structure according to claim 3, characterized in that, After the composite panel (1) is bent along the bending groove (13), the adjacent panels are perpendicular to each other.

9. The cargo box assembly composite connection structure according to claim 3, characterized in that, The bending groove (13) of the composite panel (1) is softened by heating and then closed to form a welded part (16).

10. The cargo box assembly composite connection structure according to claim 9, characterized in that, The cargo compartment (2) has a cover plate (5) welded to its top and / or bottom.

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