Engine cabin cover and vehicle

Abstract

The invention relates to an engine cabin cover and a vehicle. A cover plate body, a hinge connecting support and a lock catch mounting base of the engine cabin cover are made of composite materials in an injection molding mode to form an integrated structural part. A first reinforcing rib structure is formed on the back of the cover plate body through injection molding; a second reinforcing rib structure is formed on the outer surface of the hinge connecting bracket through injection molding; according to the structure, the engine cabin cover plate of a double-layer steel plate sheet metal part structure is replaced with a composite material single-layer structure, meanwhile, the hinge connecting support is integrated, and connecting bolts of a traditional hinge connecting support and a cover plate body are reduced; manufacturing procedures are reduced while the number of manufacturing molds is reduced; during assembly, the step of connecting the hinge connecting support and the cover plate body is omitted, and investment is reduced in the manufacturing and assembling process of the engine cabin cover; the structure of the first reinforcing rib structure and the second reinforcing rib structure realizes the light weight of the light truck engine cabin cover plate, guarantees the overall structural strength, guarantees the protection effect, and guarantees the quality of parts.

Description

Technical Field

[0001] This application relates to the technical field of vehicle parts manufacturing, and particularly relates to an engine hood and a vehicle. Background Art

[0002] At present, the primary function of the engine hood is to protect the vehicle's power system, preventing external impacts, corrosion, and high temperatures from damaging the engine, and it is required to have a certain strength, stiffness, and corrosion resistance.

[0003] Traditional metal materials, such as steel and aluminum alloy, have long dominated the manufacturing materials of engine hoods due to their good mechanical properties and workability. However, with the increasing demand for lightweight, energy conservation, and emission reduction, the application of new lightweight materials such as aluminum alloy materials and composite materials has gradually increased.

[0004] In some related technologies, the steel substitution with plastic technology replaces sheet metal parts with plastic parts. However, due to the large size of the engine hood, it is difficult to maintain the shape of the middle surface part, so a strengthening structure needs to be designed to increase the stiffness, and thus a double-layer structure of inner and outer panels is adopted; but the number of main parts and corresponding molds has not been reduced; in addition, the hinge connection structure on the engine hood still uses the sheet metal structure, adopting the form of a sheet metal reinforcement plate and a sheet metal connection plate, and finally the cost reduction effect is not obvious. Summary of the Invention

[0005] Embodiments of this application provide an engine hood and a vehicle to solve the problem in related technologies that although the engine hood is replaced with plastic parts from sheet metal parts, a double-layer structure of inner and outer panels is still adopted; the number of main parts and corresponding molds has not been reduced, and the cost reduction effect is not obvious.

[0006] In a first aspect, an engine hood is provided, which includes a cover body, a hinge connection bracket, and a lock mounting base;

[0007] The cover body, the hinge connection bracket, and the lock mounting base are integrally formed by composite material injection molding;

[0008] A first reinforcing rib structure is injection molded on the back of the cover body; a second reinforcing rib structure is injection molded on the outer surface of the hinge connection bracket; and a stainless steel embedded part is embedded in the connection hole of the hinge connection bracket.

[0009] In some embodiments, the first reinforcing rib structure includes multiple transverse ribs and multiple longitudinal ribs, and the multiple transverse ribs and the multiple longitudinal ribs are arranged crosswise with each other;

[0010] The second reinforcing rib structure includes multiple transverse ribs and multiple longitudinal ribs, and the multiple transverse ribs and the multiple longitudinal ribs are arranged crosswise with each other;

[0011] The spacing distance between the transverse ribs of the second stiffening rib structure is smaller than that between the transverse ribs of the first stiffening rib structure; the spacing distance between the longitudinal ribs of the second stiffening rib structure is smaller than that between the longitudinal ribs of the first stiffening rib structure.

[0012] In some embodiments, in the direction from the root to the top of the transverse rib and the longitudinal rib, the thicknesses of the transverse rib and the longitudinal rib gradually decrease;

[0013] The roots of the transverse rib and the longitudinal rib have rounded corners.

[0014] In some embodiments, the second stiffening rib structure includes a plurality of connected triangular or regular hexagonal stiffening ribs; the thicknesses of the triangular or regular hexagonal stiffening ribs gradually decrease in the direction from the root to the top, and the roots of the triangle or regular hexagon have rounded corners.

[0015] In some embodiments, the engine hood further includes a hood latch structure; the hood latch structure includes a connected L-shaped sheet metal bottom plate and a latch body; the L-shaped sheet metal bottom plate is provided with screw holes and a positioning protrusion; the latch mounting base is provided with screw holes and a positioning groove; the L-shaped sheet metal bottom plate contacts the latch mounting base and is connected by bolts; the positioning protrusion and the positioning groove are engaged.

[0016] In some embodiments, the engine hood further includes a hood latch structure; the hood latch structure includes a connected cross-shaped sheet metal bottom plate and a latch body; the cross-shaped sheet metal bottom plate is provided with screw holes; the latch mounting base is provided with screw holes and a cross-shaped card slot; the cross-shaped sheet metal bottom plate is located in the cross-shaped card slot and is connected to the latch mounting base by bolts.

[0017] In some embodiments, the composite material includes a modified plastic material having polypropylene and glass fibers; or,

[0018] The composite material is made by mixing a polyamide base resin and a glass fiber reinforcing agent; or,

[0019] The composite material is made by mixing a polyamide base resin, a glass fiber reinforcing agent, and a nano-scale anti-aging agent.

[0020] In some embodiments, the outer surface of the cover body is coated with a primer coat, a mid coat, and a top coat; the primer coat is an epoxy-modified polyurethane; the mid coat is a nano-ceramic coating; the top coat is a fluorocarbon varnish.

[0021] In some embodiments, the thickness of the cover body is 3 mm - 6 mm;

[0022] The thickness of the first reinforcing rib structure is 1.5 mm - 2.5 mm; the spacing distance between the transverse ribs of the first reinforcing rib structure is 45 mm - 55 mm; the spacing distance between the transverse ribs of the first reinforcing rib structure is 45 mm - 55 mm.

[0023] In a second aspect, a vehicle is provided, which includes: the above engine hood.

[0024] The beneficial effects brought by the technical solution provided in this application include:

[0025] In the embodiment of this application, an engine hood and a vehicle are provided. Since the cover body, the hinge connection bracket, and the lock mounting base are integrally formed by composite material injection molding; a first reinforcing rib structure is injection molded on the back of the cover body; a second reinforcing rib structure is injection molded on the outer surface of the hinge connection bracket; a stainless steel embedded part is embedded in the connection hole of the hinge connection bracket; the above structure replaces the engine hood cover of the double-layer steel plate sheet metal structure with a composite material single-layer structure, and at the same time integrates the hinge connection bracket, reducing the connection bolts of the traditional hinge connection bracket and the cover body; enabling the molds for manufacturing the parts of this application to be reduced, forming in one step, without separate manufacturing, reducing the manufacturing process; also reducing the connection steps of the hinge connection bracket and the cover body during assembly, thereby achieving cost reduction in the manufacturing and assembly processes of the engine hood; in addition, the structures of the first reinforcing rib structure and the second reinforcing rib structure achieve the lightweight of the light truck engine hood cover while ensuring the overall structural strength, ensuring its protection effect during actual use and ensuring the part quality. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 It is an exploded schematic view of the engine hood provided in the embodiment of this application;

[0028] Figure 2 It is a three-dimensional structural schematic view of the second reinforcing rib structure of the first structure provided in the embodiment of this application;

[0029] Figure 3 It is a schematic view of the second reinforcing rib structure in the form of a regular hexagon provided in the embodiment of this application;

[0030] Figure 4Schematic diagram of the second reinforcing rib structure in the form of a triangle provided by an embodiment of the present application;

[0031] Figure 5 Schematic diagram of the connection between the second form of the engine hood latch structure and the latch mounting base provided by an embodiment of the present application.

[0032] In the figure: 1. Cover plate body; 2. Hinge connection bracket; 3. Latch mounting base; 300. Positioning groove; 301. Grid-shaped card slot; 4. First reinforcing rib structure; 5. Second reinforcing rib structure; 6. Engine hood latch structure; 600. L-shaped sheet metal bottom plate; 601. Latch body; 602. Grid-shaped sheet metal bottom plate. Specific embodiments

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0034] In some related technologies, in the plastic-for-steel technology, sheet metal parts are replaced with plastic parts. However, due to the large size of the engine hood, it is difficult to maintain the shape of the middle surface part. Therefore, a reinforcing structure needs to be designed to increase the stiffness, so a double-layer structure of inner and outer plates is adopted; however, the number of main parts and molds has not been reduced; in addition, the hinge connection structure on the engine hood still uses a sheet metal structure, adopting the form of a sheet metal reinforcement plate and a sheet metal connection plate, and finally the cost reduction effect is not obvious.

[0035] The embodiments of the present application provide an engine hood and a vehicle to solve the problem that in the related technologies, the engine hood is replaced with plastic parts, but still adopts a double-layer structure of inner and outer plates; the number of main parts and corresponding molds has not been reduced, and the cost reduction effect is not obvious.

[0036] Please refer to Figure 1 , an engine hood, which includes a cover plate body 1, a hinge connection bracket 2, and a latch mounting base 3;

[0037] The cover plate body 1, the hinge connection bracket 2, and the latch mounting base 3 are integrally formed by composite material injection molding;

[0038] The first reinforcing rib structure 4 is injection molded on the back surface of the cover plate body 1; the second reinforcing rib structure 5 is injection molded on the outer surface of the hinge connection bracket 2; a stainless steel embedded part is embedded in the connection hole of the hinge connection bracket 2.

[0039] The above structure replaces the engine compartment cover plate with a double-layer steel sheet metal structure with a single-layer composite material structure, and at the same time integrates the hinge connection bracket 2, reducing the connection bolts between the traditional hinge connection bracket 2 and the cover plate body 1; enabling the reduction of the molds when manufacturing the parts of this application, forming in one step, without the need for separate manufacturing, reducing the manufacturing process; also reducing the connection steps between the hinge connection bracket 2 and the cover plate body 1 during assembly, thereby achieving cost reduction in the manufacturing and assembly processes of the engine compartment cover; in addition, the structures of the first reinforcing rib structure 4 and the second reinforcing rib structure 5 achieve the lightweight of the light truck engine compartment cover while ensuring the overall structural strength, ensuring its protection effect during actual use and ensuring the part quality.

[0040] The above application of composite materials and optimized structure achieve the lightweight of the light truck engine compartment cover, with obvious advantages; and the number of parts is less, the forming and assembly are simpler, the production input is lower, the forming efficiency is high, and it has competitiveness. The whole vehicle with a lightweight composite material engine compartment cover can not only help the whole vehicle meet the weight requirements and meet the sales compliance; but also increase the user's cargo capacity, bringing considerable economic benefits to the user, and can effectively improve the commodity competitiveness of the whole vehicle.

[0041] In some preferred embodiments, specific composite materials are described in detail as follows:

[0042] The first composite material; the composite material includes a modified plastic material having polypropylene and glass fiber;

[0043] When using composite materials to replace metal materials or fiberglass materials, it is necessary to ensure that the selected materials can meet the stiffness and strength requirements of the parts, and have significant advantages in terms of weight, cost, and manufacturing.

[0044] The traditional material of the engine compartment cover is usually steel plate. It can be seen from Table 1 that traditional steel has a relatively high flexural modulus and tensile strength, and the parameter performance of conventional plastic materials (such as PP, ABS, etc.) cannot reach that level. By using PP + 30GF composite material, its flexural modulus, strength and other performance parameters are improved by adding glass fiber and other methods to meet the design requirements of the parts; at the same time, under the condition of the same performance, the density of PP + 30GF composite material is much lower than that of steel, having the obvious advantage of light weight. PP is polypropylene and 30GF is 30% glass fiber.

[0045] Table 1 Comparison of material performance parameters

[0046]

[0047] Therefore, for the lightweight engine compartment cover, considering the weight and cost of the parts, PP + 30GF with relatively low density and good strength is selected as the manufacturing material.

[0048] The second composite material;

[0049] Due to the insufficient long-term weather resistance of the plastic substrate, the following may occur:

[0050] Yellowing and aging under ultraviolet irradiation (the color difference ΔE increases by 0.8 - 1.2 per year)

[0051] The risk of creep deformation in a high-temperature environment (>85°C) (annual deformation > 0.5 mm)

[0052] Low-temperature brittleness (the impact strength decreases by 40% at -30°C).

[0053] To address the above problems, the composite material is made by mixing a polyamide-based resin and a glass fiber reinforcing agent; that is, a PA6 + 30% long glass fiber reinforcement system is adopted to ensure: heat distortion temperature ≥ 160°C (ASTM D648); tensile strength ≥ 150 MPa (ISO 527); notched impact strength ≥ 15 kJ / m 2 (ISO 179). PA6 is the polyamide-based resin;

[0054] The third composite material;

[0055] To further enhance the anti-aging effect, the composite material is made by mixing a polyamide-based resin, a glass fiber reinforcing agent, and a nano-scale anti-aging agent; that is, on the basis of the second composite material, 0.5 - 1.0% of a nano-scale anti-aging agent combination is added. This combination includes: ultraviolet absorber: Tinuvin 326;; hindered amine light stabilizer: Chimassorb944; antioxidant: Irganox 1010.

[0056] Furthermore, the outer surface of the cover body 1 is in long-term contact with the outside world and needs to have a protective function; the outer surface of the cover body 1 is coated with a primer coat, an intermediate coat, and a top coat; the primer coat is epoxy-modified polyurethane with a thickness of 50 - 55 μm; the intermediate coat is a nano-ceramic coating with a thickness of 30 - 35 μm; the top coat is fluorocarbon varnish with a thickness of 20 μm. Implement a triple protective coating, primer coat: epoxy-modified polyurethane (thickness 50 μm); intermediate coat: nano-ceramic coating (thickness 30 μm); top coat: fluorocarbon varnish (thickness 20 μm).

[0057] The determination of the above specific thicknesses can be actually measured through weather resistance tests, such as QUV aging for 3000 hours and salt spray test for 1000 hours.

[0058] In some preferred embodiments, for the hinge connection bracket 2, when the engine hood flips, this is the main stress-bearing part, and high strength and stiffness are required. Therefore, a dense rib structure is designed here. At the same time, since this is not a visible surface, the thickness of the ribs can be correspondingly increased to enhance the strength of the structure here. In addition, the structural strength of the cover body 1 also needs to be ensured. For specific references, please refer to the following description:

[0059] First, referring to Figure 1 and Figure 2 as shown, the first rib structure 4 includes multiple transverse ribs and multiple longitudinal ribs, and the multiple transverse ribs and multiple longitudinal ribs are arranged crosswise with each other;

[0060] The second rib structure 5 includes multiple transverse ribs and multiple longitudinal ribs, and the multiple transverse ribs and multiple longitudinal ribs are arranged crosswise with each other;

[0061] The spacing distance between the transverse ribs of the second rib structure 5 is less than the spacing distance between the transverse ribs of the first rib structure 4; the spacing distance between the longitudinal ribs of the second rib structure 5 is less than the spacing distance between the longitudinal ribs of the first rib structure 4.

[0062] In the first structural design, the structures of the first rib structure 4 and the second rib structure 5 are similar, but the degree of spacing between the transverse ribs and longitudinal ribs of the second rib structure 5 is different and is denser.

[0063] Furthermore, in the direction from the root to the top of the transverse ribs and longitudinal ribs, the thickness of the transverse ribs and longitudinal ribs gradually decreases; the roots of the transverse ribs and longitudinal ribs have rounded corners.

[0064] The reason for such a design is as follows: stress concentration occurs at the connection between the ribs and the substrate; the fatigue life of the hinge connection area is only 80,000 - 100,000 times, which is lower than the vehicle design life requirement; plastic deformation may occur at the latch installation point under long-term loads. Therefore, the above scheme adopts a variable thickness design, with a root fillet radius R≥2.5mm; 304 stainless steel embedded parts are embedded at key connection parts to resist plastic deformation.

[0065] Second, referring to Figure 4 and Figure 3 as shown, the second rib structure 5 includes multiple connected triangular or regular hexagonal ribs; the thickness of the triangular or regular hexagonal ribs gradually decreases in the direction from the root to the top, and the roots of the triangle or regular hexagon have rounded corners.

[0066] In the second form, the structures of the first reinforcing rib structure 4 and the second reinforcing rib structure 5 are different for structural optimization; triangles or regular hexagons have good mechanical properties and also adopt a variable thickness design; 304 stainless steel embedded parts are embedded at key connection parts to resist plastic deformation. Among them, the root fillet should not be too large, otherwise it is easy to cause surface depression or whitening, and the smallest process fillet will be left with a fillet; the above-mentioned gradient design is also set considering the mold draft requirements.

[0067] Both of the above forms can be implemented and can be selected according to needs.

[0068] In some preferred embodiments, the thickness of the cover body 1 is 3 mm - 6 mm;

[0069] The thickness of the first reinforcing rib structure is 1.5 mm - 2.5 mm; the spacing between the transverse ribs of the first reinforcing rib structure is 45 mm - 55 mm; the spacing between the transverse ribs of the first reinforcing rib structure is 45 mm - 55 mm.

[0070] The thickness of the reinforcing rib should generally be less than the wall thickness of the product to be reinforced to prevent depression at the connection. Generally speaking, the thickness of the reinforcing rib should not exceed 50% - 60% of the wall thickness of the plastic part. For this part, it is most preferable that the cover body 1 is designed to be 4 mm thick, the reinforcing rib is designed to be 2 mm thick, and the layout spacing is 50 mm.

[0071] In some preferred embodiments, referring to Figure 1 , the engine hood further includes a hood latch structure 6; the hood latch structure 6 includes a connected L-shaped sheet metal bottom plate 600 and a latch body 601; the L-shaped sheet metal bottom plate 600 is provided with screw holes and a positioning protrusion; the latch mounting base 3 is provided with screw holes and a positioning groove 300; the L-shaped sheet metal bottom plate 600 contacts the latch mounting base 3 and is bolted; the positioning protrusion and the positioning groove 300 are engaged. It should be noted that the positioning groove 300 cannot be rounded and needs to be planar, and the L-shaped sheet metal bottom plate 600 also needs to be flanged to form a mating surface.

[0072] The above structure realizes an integrated structural part formed by injection molding of the cover body 1, the hinge connection bracket 2, and the latch mounting base 3 using a composite material, and the hood latch structure 6, and the two parts are assembled into a hood assembly.

[0073] In this embodiment, there is another way of the installation structure of the hood latch structure 6, which can better resist plastic deformation and improve the service life. Specifically:

[0074] Referring to Figure 5The content shown also includes a hood latch structure 6; the hood latch structure 6 includes a cross-shaped sheet metal bottom plate 602 and a latch body 601 connected to each other; the cross-shaped sheet metal bottom plate 602 is provided with screw holes; the latch mounting base 3 is provided with screw holes and a cross-shaped card slot 301; the cross-shaped sheet metal bottom plate 602 is located in the cross-shaped card slot 301 and is connected to the latch mounting base 3 by bolts.

[0075] A cross-shaped reinforcement structure is adopted and embedded in the latch mounting base 3. Since the cross-shaped sheet metal bottom plate 602 is integrally embedded, compared with the positioning slot 300, the volume occupied by slotting can be reduced, and the thickness of the cross-shaped sheet metal bottom plate 602 can be increased, further improving the structural strength and resisting deformation.

[0076] This application also provides a vehicle, which includes: the engine hood described above.

[0077] Through the above description, this application changes the traditional double-layer steel plate structure (weight 18 - 22 kg) to a 4-mm single-layer plastic substrate, combined with a cross-shaped rib network (rib thickness 2 mm, spacing 50 mm), achieving a weight reduction of more than 40%. Differentiated designs are adopted for key stress parts: the hinge connection bracket 2 adopts a high-density rib array, and the latch mounting base 3 is an integrated molding structure. The injection molding process for the entire engine hood realizes the integrated manufacturing of structures such as the cover body 1, the hinge connection bracket 2, and the latch mounting base 3; finally, the number of parts is reduced, the assembly process is simplified, the mold cost is reduced, the structural strength performance is improved, and vibration and abnormal noise are effectively suppressed; the manufacturing production beat is accelerated, and the efficiency is greatly improved compared with the traditional stamping and welding process.

[0078] In addition, in terms of economic benefits, the cost of a single piece of material is reduced, and the weight reduction of the whole vehicle brings an improvement in fuel efficiency; the platform expansion efficiency is improved, supporting the rapid adaptation of multiple vehicle models;

[0079] This solution optimizes the rib layout, achieves a balance between weight reduction and strength, and cooperates with the weld line control technology of the injection molding process to realize the coordinated optimization of structural performance and production efficiency.

[0080] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. Unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0081] It should be noted that in the present application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device including the said element.

[0082] The above description is only the specific implementation manners of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An engine nacelle cover, comprising a cover plate body (1), a hinge connection bracket (2) and a lock mounting base (3), characterized in that: The cover plate body (1), the hinge connection bracket (2) and the lock mounting base (3) are formed into an integrated structural component by injection molding of composite materials; A first reinforcing rib structure (4) is formed by injection molding on the back of the cover plate body (1); a second reinforcing rib structure (5) is formed by injection molding on the outer surface of the hinge connection bracket (2); and a stainless steel embedded part is embedded in the connection hole of the hinge connection bracket (2).

2. The engine hood according to claim 1, characterized in that: The first reinforcing rib structure (4) comprises a plurality of transverse ribs and a plurality of longitudinal ribs, and the plurality of transverse ribs and the plurality of longitudinal ribs are arranged to cross each other; The second reinforcing rib structure (5) comprises a plurality of transverse ribs and a plurality of longitudinal ribs, and the plurality of transverse ribs and the plurality of longitudinal ribs are arranged to cross each other; The spacing distance between the transverse ribs of the second reinforcing rib structure (5) is smaller than the spacing distance between the transverse ribs of the first reinforcing rib structure (4); the spacing distance between the longitudinal ribs of the second reinforcing rib structure (5) is smaller than the spacing distance between the longitudinal ribs of the first reinforcing rib structure (4).

3. The engine hood according to claim 2, characterized in that: The thickness of the transverse ribs and the longitudinal ribs gradually decreases from their roots to their tops; The roots of the transverse ribs and the longitudinal ribs have rounded corners.

4. The engine hood according to claim 1, characterized in that: The second reinforcing rib structure (5) comprises a plurality of connected triangular or regular hexagonal reinforcing ribs; the thickness of the triangular or regular hexagonal reinforcing ribs gradually decreases from their roots to their tops, and the roots of the triangles or regular hexagons have rounded corners.

5. The engine hood according to claim 1, characterized in that: The engine hood also includes a hood lock structure (6); the hood lock structure (6) includes an L-shaped sheet metal base plate (600) and a lock body (601) connected to each other; the L-shaped sheet metal base plate (600) is provided with screw holes and a positioning protrusion; the lock mounting base (3) is provided with screw holes and a positioning groove (300); the L-shaped sheet metal base plate (600) is in contact with the lock mounting base (3) and is connected by bolts; the positioning protrusion and the positioning groove (300) are engaged.

6. The engine hood according to claim 1, characterized in that: The engine hood also includes a hood lock structure (6); the hood lock structure (6) includes a tic-tac-toe-shaped sheet metal base plate (602) and a lock body (601) connected to each other; the tic-tac-toe-shaped sheet metal base plate (602) is provided with screw holes; the lock mounting base (3) is provided with screw holes and a tic-tac-toe-shaped slot (301); the tic-tac-toe-shaped sheet metal base plate (602) is located in the tic-tac-toe-shaped slot (301) and is connected to the lock mounting base (3) by bolts.

7. The engine hood according to claim 1, characterized in that: The composite material comprises a modified plastic material having polypropylene and glass fibers; or, The composite material is made by mixing a polyamide base resin and a glass fiber reinforcement; or, The composite material is prepared by mixing polyamide base resin, glass fiber reinforcement and nanometer-level anti-aging agent.

8. The engine hood according to claim 1, characterized in that: The outer surface of the cover plate body (1) is coated with a primer, a middle coating and a top coating; the primer is epoxy-modified polyurethane; the middle coating is a nano-ceramic coating; and the top coating is a fluorocarbon varnish.

9. The engine hood according to claim 2, characterized in that: The thickness of the cover plate body (1) is 3 mm to 6 mm; The thickness of the first reinforcing rib structure is 1.5mm-2.5mm; the spacing distance between the transverse ribs of the first reinforcing rib structure is 45mm-55mm; the spacing distance between the transverse ribs of the first reinforcing rib structure is 45mm-55mm.

10. A vehicle, characterized in that: It includes: An engine bonnet as claimed in any one of claims 1 to 9.

Images