Lid and carrier

Abstract

The application relates to the technical field of carriers, and discloses a machine cover and a carrier, wherein the machine cover comprises an inner plate, an outer plate and a frame, all of which are made of carbon fiber materials, and the frame is located between the inner plate and the outer plate; the inner plate comprises an inner plate body, and a connecting surface is arranged on the surface of the inner plate body facing the frame; the frame has opposite first and second end surfaces and a side surface connected between the first and second end surfaces, the first end surface faces the connecting surface and is connected with the connecting surface, and the second end surface faces the outer plate and is connected with the outer plate. The inner plate, the outer plate and the frame of the machine cover are all made of carbon fiber materials, so that the machine cover has the advantages of light weight and flexible modeling. Furthermore, the frame is arranged between the inner plate and the outer plate, so when the modeling of the outer plate is changed, the modeling of the outer plate is changed under the action of the frame, and the shape of the inner plate does not need to be redesigned, thereby the overall production cost of the machine cover can be significantly reduced, and the development cycle of the machine cover is shortened.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, specifically to a hood and a vehicle. Background Technology

[0002] The hood of a car consists of an inner panel and an outer panel, and carbon fiber materials have been widely used in the production of inner and outer panels due to their advantages of easy shaping, lightweight and relatively low production cost.

[0003] In related technologies, the inner and outer panels are usually manufactured separately and then assembled. When the shape of the outer panel changes, the shape of the inner panel needs to be redesigned, which increases the overall production cost of the hood. Summary of the Invention

[0004] This application provides a hood and carrier to solve or improve the problem of affecting the structural performance of the hood when it adopts a modular design.

[0005] In a first aspect, this application provides a hood, including an inner panel, an outer panel, and a frame, all made of carbon fiber material, with the frame located between the inner panel and the outer panel; the inner panel includes an inner panel body, and a connecting surface is provided on the surface of the inner panel body facing the frame; the frame has opposing first end faces and second end faces, and a side face connected between the first end face and the second end face, the first end face facing the connecting surface and connected to the connecting surface, and the second end face facing the outer panel and connected to the outer panel.

[0006] Beneficial effects: The inner panel, outer panel, and frame of the hood are all made of carbon fiber, giving the hood the advantages of being lightweight and having flexible shapes. Furthermore, by setting a frame between the inner and outer panels, with the inner panel connected to the first end face of the frame via a connecting surface, and the outer panel connected to the second end face of the frame, the frame allows for a seamless connection and transition between the inner and outer panels. When the shape of the outer panel changes, the shape and size of the first end face of the frame can be retained; only the shape and size of the second end face and sides of the frame need to be adjusted to fit the outer panel. Thus, thanks to the frame, changes in the outer panel shape do not require redesigning the inner panel shape, significantly reducing the overall production cost of the hood and shortening the hood development cycle.

[0007] In one alternative embodiment, the connecting surface is arranged around the periphery of the inner plate body, and the frame is an annular frame adapted to the shape of the connecting surface.

[0008] In one optional embodiment, the inner plate body has a receiving cavity on its surface facing the outer plate, and the inner plate further includes a reinforcing rib disposed in the receiving cavity; the reinforcing rib has a supporting rib disposed on its surface facing the outer plate, and the supporting rib is connected to the outer plate on its surface facing the outer plate.

[0009] In one alternative embodiment, the inner panel body has a first side and a second side opposite to each other along a first direction, and the second side of the inner panel body is used to install a hinge assembly; the reinforcing rib includes a pair of first reinforcing ribs arranged at an included angle, and the vertex of the included angle formed by the pair of first reinforcing ribs faces the second side of the inner panel body, and the pair of first reinforcing ribs are connected near the middle by a connecting rib.

[0010] In one optional embodiment, a second reinforcing rib, a third reinforcing rib, and a fourth reinforcing rib are provided on each side of the pair of first reinforcing ribs that are far apart from each other along the second direction, and one end of the second reinforcing rib is connected to the vertex; the first reinforcing rib, the second reinforcing rib, the third reinforcing rib, and the fourth reinforcing rib are connected end to end in sequence to form a ring structure.

[0011] In an optional embodiment, a fifth and a sixth reinforcing rib are further provided between the second and the fourth reinforcing ribs. The fifth and the sixth reinforcing ribs are spaced apart along the direction from the first to the second side of the inner plate body and extend along the second direction. The two ends of the fifth and the sixth reinforcing ribs are respectively connected to the first and the third reinforcing ribs.

[0012] In one optional embodiment, the included angle between a pair of first reinforcing ribs is α, satisfying: 15°≤α≤25°; and / or, the distance between the fourth reinforcing rib and the fifth reinforcing rib along the first direction is L1, the distance between the fifth reinforcing rib and the sixth reinforcing rib along the first direction is L2, and the maximum distance between the sixth reinforcing rib and the second reinforcing rib along the first direction is L3, satisfying: L1=0.8 L2~1.2 L2=1.8 L3~2.2 L3.

[0013] In an optional embodiment, a seventh reinforcing rib is provided between the fifth and sixth reinforcing ribs. The seventh reinforcing rib extends along the first direction and its two ends are connected to the fifth and sixth reinforcing ribs, respectively. The maximum distance between the seventh reinforcing rib and the first reinforcing rib along the second direction is L4, and the maximum distance between the seventh reinforcing rib and the third reinforcing rib along the second direction is L5, satisfying L4 = 0.8. L5~1.2 L5.

[0014] In one optional embodiment, the inner plate body is provided with a ventilation opening, the ventilation opening being located between the second reinforcing rib and the sixth reinforcing rib; and / or, the inner plate body is provided with a first weight-reducing hole, the first weight-reducing hole being located between the fifth reinforcing rib and the sixth reinforcing rib; and / or, the inner plate body is provided with a second weight-reducing hole, the second weight-reducing hole being located between the fourth reinforcing rib and the fifth reinforcing rib.

[0015] In one alternative embodiment, the inner plate body is provided with a hinge reinforcement plate, and the hinge reinforcement plate is provided with a plurality of mounting holes arranged in an array, and the hinge assembly can be connected to the hinge reinforcement plate through different mounting holes.

[0016] In one optional embodiment, the inner panel body is provided with a first interface for installing a locking fastener; the inner panel body is also provided with a second interface for installing a buffer, the surface of the buffer away from the inner panel body being connected to the outer panel.

[0017] In one optional embodiment, the inner panel body includes an energy-absorbing area, a load-bearing area, and an installation area. The energy-absorbing area is located on the side of the fourth reinforcing rib facing the first side of the inner panel body. The load-bearing area is correspondingly arranged with the area enclosed by the second, third, and fourth reinforcing ribs. The installation area is correspondingly arranged with the first interface, the second interface, and the hinge reinforcing plate. The ply angle of the energy-absorbing area is 0° or 90°, and the single-sided layer density of the energy-absorbing area ply is 150 g / m². 2 ~200g / m 2 ; and / or, the ply angle of the load-bearing region is ±45°, and the single-sided layer density of the load-bearing region is 300 g / m². 2 ~400g / m 2 ; and / or, embedded parts are provided in the ply of the installation area.

[0018] Secondly, this application provides a vehicle, including a vehicle body and a hood as described in any of the above claims, wherein the inner panel is connected to the vehicle body.

[0019] Beneficial Effects: The vehicle is equipped with the aforementioned hood, whose inner panel, outer panel, and frame are all made of carbon fiber, giving the hood the advantages of lightweight design and flexible shape. Furthermore, by setting a frame between the inner and outer panels, with the inner panel connected to the first end face of the frame via a connecting surface, and the outer panel connected to the second end face of the frame, the frame facilitates the connection and transition between the inner and outer panels. When the shape of the outer panel changes, the shape and size of the first end face of the frame can be retained; only the shape and size of the second end face and sides of the frame need to be adjusted to fit the outer panel shape. Thus, thanks to the frame, when the outer panel shape changes, there is no need to redesign the inner panel shape, significantly reducing the overall production cost of the hood and shortening the hood development cycle. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is an exploded view of the hood according to an embodiment of this application;

[0022] Figure 2 This is a schematic diagram of the inner plate structure according to an embodiment of this application;

[0023] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0024] Figure 4 This is an exploded view of the hinge reinforcement plate and the hinge cover side bracket according to an embodiment of this application;

[0025] Figure 5 for Figure 2 A magnified view of a section at point B in the middle;

[0026] Figure 6 This is a schematic diagram showing the positional relationship of the reinforcing ribs in an embodiment of this application;

[0027] Figure 7 This is a schematic diagram showing the positional relationship between the energy-absorbing area, the load-bearing area, and the installation area in an embodiment of this application.

[0028] Figure 8 This is a schematic diagram of the border structure in an embodiment of this application;

[0029] Figure 9 This is a schematic diagram of the outer panel structure according to an embodiment of this application;

[0030] Figure 10 This is a schematic diagram of the weakened region in an embodiment of this application;

[0031] Figure 11 for Figure 10 The front view.

[0032] Explanation of reference numerals in the attached figures:

[0033] Y, first direction; X, second direction;

[0034] 1. Inner panel; 101. Inner panel body; 1011. Connecting surface; 1012. Receiving cavity; 1010. First side; 1020. Second side;

[0035] 102. Reinforcing rib; 1021. First reinforcing rib; 1022. Second reinforcing rib; 1023. Third reinforcing rib; 1024. Fourth reinforcing rib; 1025. Fifth reinforcing rib; 1026. Sixth reinforcing rib; 1027. Seventh reinforcing rib; 1028. Eighth reinforcing rib; 1029. Connecting rib;

[0036] 103. Support rib; 104. Ventilation opening; 105. First weight-reducing hole; 106. Second weight-reducing hole; 107. First interface; 108. Second interface;

[0037] 110. Energy absorption zone; 120. Load-bearing zone; 130. Installation zone;

[0038] 2. Outer panel; 201. First outer panel; 2011. Upper surface layer of outer panel; 2012. Lower surface layer of outer panel; 2013. Weakening groove structure; 202. Second outer panel; 203. Radiator air guide module; 204. Sign installation area; 205. Shaping rib line; 210. Weakening area;

[0039] 3. Frame; 301. First end face; 302. Second end face; 303. Side face;

[0040] 4. Hinge reinforcement plate; 5. Hinge assembly; 501. Hinge hood side bracket; 502. Hinge body side bracket;

[0041] 6. Mounting holes; 7. Locking fasteners; 8. Buffer components; 9. Structural adhesive. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0043] A car's hood consists of an inner panel and an outer panel. Carbon fiber, due to its ease of shaping, lightweight nature, and relatively low production cost, has been widely used in the production of both inner and outer panels. In related technologies, the inner and outer panels are typically manufactured separately and then assembled. When the shape of the outer panel changes, the shape of the inner panel needs to be redesigned, leading to an increase in the overall production cost of the hood.

[0044] Furthermore, while some existing sheet metal hoods utilize a universal inner panel, allowing for compatibility with different products by replacing the outer panel and the connecting structure between them, the inner and outer panels are still sheet metal structures. The inner panel is welded to the connecting structure, and the connecting structure is welded to the outer panel. This connection method not only reduces the overall strength of the hood but also creates a large heat-affected zone, thus impacting the hood's structural performance.

[0045] To solve the two problems mentioned above, the following will combine... Figures 1 to 11 This describes an embodiment of the present application.

[0046] According to embodiments of this application, in a first aspect, this application provides a hood that can be applied to an automobile engine compartment hood or to similar covering components of other vehicles. For example... Figure 1 As shown, the hood mainly includes an inner panel 1, an outer panel 2, and a frame 3. All three panels are made of carbon fiber, with the frame 3 located between the inner panel 1 and the outer panel 2. The inner panel 1, outer panel 2, and frame 3 can be manufactured using processes such as compression molding of carbon fiber prepreg or resin transfer molding (RTM), giving the hood the advantages of being lightweight, high-strength, and suitable for complex designs.

[0047] like Figure 2As shown, the inner panel 1 includes an inner panel body 101, which is generally plate-shaped. A connecting surface 1011 is provided on the surface of the inner panel body 101 facing the frame 3. The connecting surface 1011 can be a plane, a curved surface, or a combination of multiple planes. The frame 3 has a first end face 301 and a second end face 302 facing each other, and a side surface 303 connecting the first end face 301 and the second end face 302. The first end face 301 faces the connecting surface 1011 and is connected to the connecting surface 1011. The connecting surface 1011 is matched with the first end face 301 to achieve a stable connection between the connecting surface 1011 and the first end face 301. The second end face 302 faces the outer panel 2 and is connected to the outer panel 2.

[0048] First, it should be noted that, as Figure 2 As shown, in this embodiment, the first direction Y of the inner plate body 101 can also be the front-rear direction of the vehicle, and the second direction X of the inner plate body 101 can also be the left-right direction of the vehicle. Of course, those skilled in the art can also make adaptive adjustments to the specific directions referred to by the first direction Y and the second direction X according to actual needs.

[0049] In this embodiment, the connection surface 1011 of the inner panel body 101 and the first end face 301 of the frame 3, as well as the connection surface 302 of the frame 3 and the outer panel 2, are preferably connected by adhesive bonding. This allows for a lightweight hood design while maintaining connection strength by using structural adhesive 9 to connect the inner panel 1, frame 3, and outer panel 2. Furthermore, compared to the welding-fixed connection method used in existing sheet metal structures, adhesive bonding is less likely to generate a welding heat-affected zone, ensuring the structural performance of the hood. Of course, in addition to the adhesive bonding method described above, fixed connections can also be achieved through bolting, riveting, or a combination of multiple connection methods.

[0050] like Figure 2 As shown, the shape of the inner panel body 101, especially the shape and dimensions of the connecting surface 1011 on the inner panel body 101, matches the shape and dimensions of the first end face 301 of the frame 3. When the shape of the outer panel 2 of the hood changes, according to the changed shape of the outer panel 2, it is only necessary to redesign and manufacture the frame 3 so that the shape of the second end face 302 and the side face 303 of the frame 3 adapts to the peripheral contour of the new outer panel 2, while maintaining the shape and dimensions of the first end face 301 of the frame 3 to match the original connecting surface 1011 of the inner panel body 101. In this way, under the action of the frame 3, when the shape of the outer panel 2 changes, it is not necessary to redesign the shape of the inner panel 1, thereby significantly reducing the overall production cost of the hood and shortening the hood development cycle.

[0051] like Figure 8As shown, the frame 3 includes a first end face 301, a second end face 302, and a side face 303. The side face 303 of the frame 3 can be a vertical surface perpendicular to the first end face 301 and the second end face 302, or it can be a transition surface with a certain angle or a complex curved surface, thereby improving the appearance of the cover and meeting the connection strength between the inner panel 1 and the outer panel 2.

[0052] like Figure 9 As shown, the outer panel 2 includes a first outer panel 201 and a second outer panel 202. When the inner panel body 101 has a first side 1010 and a second side 1020 along the first direction Y, the first outer panel 201 is close to the first side 1010 of the inner panel body 101, and the second outer panel 202 is close to the second side 1020 of the inner panel body 101. An installation opening is also provided between the first outer panel 201 and the second outer panel 202. A radiator air guide module 203 can be installed in the installation opening. The radiator air guide module 203 can be a mesh structure. The radiator air guide module 203 facilitates airflow on the one hand and blocks debris from the external environment from entering the ventilation duct on the other hand. The specific shape and size of the radiator air guide module 203 are adaptively adjusted according to the shape of the outer panel 2.

[0053] Furthermore, such as Figure 9 As shown, the first outer panel 201 is also provided with a sign installation area 204 and a styling rib 205. When preparing the outer panel 2, a threaded base is pre-embedded in the sign installation area 204 of the first outer panel 201, which facilitates the subsequent installation of vehicle signs on the outer panel 2. The styling rib 205 can be adaptively adjusted according to the specific shape of the outer panel 2, and the styling rib 205 is preferably integrally formed with the outer panel 2.

[0054] Optionally, such as Figure 10 , Figure 11 As shown, a weakening region 210 is provided in the area of ​​the first outer plate 201 near the first side 1010 of the inner plate body 101. In the weakening region 210, the first outer plate 201 includes an upper surface ply 2011 and a lower surface ply 2012. A plurality of weakening groove structural members 2013 are provided between the upper surface ply 2011 and the lower surface ply 2012. The plurality of weakening groove structural members 2013 extend along the first direction Y and are spaced apart along the second direction X, forming a roughly V-shaped weakening groove structure. The outer upper surface layer 2011 and the lower surface layer 2012 of the outer panel in the weakened zone 210 area are made of carbon fiber and aramid fiber mixed layer, which ensures the structural strength of the outer panel 2 during normal use and allows it to collapse more accurately along the weakened groove when a pedestrian collides. Its energy absorption can be increased by more than 50%, thus effectively solving the problems of high brittleness, uncontrollable collapse path and easy secondary injury when a pedestrian hood is collided. It achieves more precise control of the collapse path and energy absorption, and meets the needs of pedestrian protection.

[0055] Optionally, such as Figure 11 As shown, the distance H between the upper surface layup 2011 and the lower surface layup 2012 of the outer plate is 0.5mm to 1mm, the minimum spacing L6 between the two weakening groove structural members 2013 along the second direction X is 5mm to 8mm, and the included angle β between two adjacent weakening groove structural members 2013 is 60° to 90°. Furthermore, the weakening groove structural member 2013 can be used as a separate prefabricated body, and is integrally formed in a mold during the layup of the outer plate 2.

[0056] In one embodiment, the connecting surface 1011 is arranged around the periphery of the inner plate body 101, and the frame 3 is an annular frame adapted to the shape of the connecting surface 1011. In other words, the connecting surface 1011 is a continuous annular surface formed on the circumferential edge of the inner plate body 101, the first end face 301 of the frame 3 is adapted to the connecting surface 1011, and the side surface 303 and the second end face 302 of the frame 3 are also annularly arranged, so that the frame 3 as a whole forms an annular frame.

[0057] In this embodiment, as Figure 2 As shown, since the frame 3 adopts a ring-shaped frame, when the size of the outer panel 2 changes along the first direction Y, and when the size of the outer panel 2 changes along the second direction X, the frame 3 can be adjusted accordingly to match the changes in the size of the outer panel 2 in different directions. Specifically, when the size of the outer panel 2 in the first direction Y increases or decreases, the size of the second end face 302 of the frame 3 in the first direction Y and the size of the side face 303 can be adjusted accordingly to match the longer or shorter end edges of the outer panel 2 along the first direction Y. When the size of the outer panel 2 in the second direction X increases or decreases, the size of the second end face 302 of the frame 3 in the second direction X and the size of the side face 303 can be adjusted accordingly to match the longer or shorter end edges of the outer panel 2 along the second direction X. With this setting, for different models on the same vehicle platform or sharing the same inner panel 1, even if the length, width, and curvature of the outer panel 2 change, only the shape of the second end face 302 and the side face 303 of the frame 3 needs to be redesigned according to the outline of the outer panel 2, thus expanding the applicability of the inner panel 1.

[0058] In one embodiment, the inner plate body 101 has a receiving cavity 1012 on the surface facing the outer plate 2, and the inner plate 1 also includes a reinforcing rib 102 disposed in the receiving cavity 1012; the reinforcing rib 102 has a supporting rib 103 disposed on the surface facing the outer plate 2, and the surface facing the supporting rib 103 is connected to the outer plate 2.

[0059] In this embodiment, as Figure 2As shown, the receiving cavity 1012 is a downwardly recessed area formed during the molding of the inner plate body 101. The shape and size of the receiving cavity 1012 can be adaptively adjusted according to the specific shape and rigidity performance requirements of the inner plate body 101. A reinforcing rib 102 is provided within the receiving cavity 1012. The reinforcing rib 102 is also made of carbon fiber material. The reinforcing rib 102 can be molded independently and then fixed to the surface of the inner plate body 101 facing the outer plate 2 using structural adhesive 9. The reinforcing rib 102 can improve the overall strength of the inner plate 1. Furthermore, the reinforcing rib 102 can support the outer plate 2, thereby improving the overall rigidity and dent resistance of the hood.

[0060] Furthermore, such as Figure 8 As shown, a support rib 103 is provided between the reinforcing rib 102 and the outer plate 2. The support rib 103 is preferably bonded to the reinforcing rib 102, and also preferably bonded to the outer plate 2. When the shape of the outer plate 2 changes, not only may the dimensions of the outer plate 2 along the first direction Y and the second direction X change, but the overall height of the outer plate 2 may also change. Therefore, a support rib 103 is provided on the surface of the reinforcing rib 102 facing the outer plate 2. As a replaceable module, the specific height of the support rib 103 is adaptively adjusted according to the specific shape of the outer plate 2, so that the surface of the support rib 103 facing the outer plate 2 can directly or indirectly contact and connect with the outer plate 2, thereby effectively supporting the outer plate 2. It can be understood that the specific relative position of the support rib 103 and the reinforcing rib 102 can be adaptively adjusted according to actual needs to meet the support requirements of outer plates 2 with different shapes.

[0061] In one embodiment, such as Figure 2 , Figure 3 , Figure 4 As shown, the inner panel body 101 is generally flat. The inner panel body 101 has a first side 1010 and a second side 1020 along the first direction Y. The second side 1020 of the inner panel body 101 is used to mount the hinge assembly 5. That is, after the hood is installed on the vehicle, the first side 1010 of the inner panel body 101 is the side away from the cab, and the second side 1020 of the inner panel body 101 is the side closer to the cab. The second side 1020 of the inner panel body 101 is used to mount the hinge assembly 5 to connect the hood and the vehicle body structure.

[0062] To enhance the overall strength of inner panel 1, such as Figure 2As shown, the reinforcing rib 102 includes a pair of first reinforcing ribs 1021 arranged at an included angle, with the apex of the angle between the pair of first reinforcing ribs 1021 facing the second side 1020 of the inner panel body 101. The pair of first reinforcing ribs 1021 are connected near the center by a connecting rib 1029. Specifically, both of the pair of first reinforcing ribs 1021 protrude from the surface of the inner panel body 101 and are connected by a connecting rib 1029. They extend along the first direction Y in a non-parallel manner on the surface of the inner panel body 101 and intersect near the second side 1020 of the inner panel body 101 to form the apex of an A-shaped structure. This apex is preferably located at the edge of the second side 1020 and close to the center region of the second side 1020, thereby making the pair of first reinforcing ribs 1021 evenly distributed on the inner panel body 101. The pair of first reinforcing ribs 1021 can redirect the load of the mounting area where the hinge assembly 5 is located to other areas of the inner panel body 101, improving the overall strength of the inner panel 1.

[0063] Optionally, an eighth reinforcing rib 1028 in a triangular shape is also provided between a pair of first reinforcing ribs 1021. The eighth reinforcing rib 1028 is close to the first side 1010 of the inner plate body 101, and the tip of the eighth reinforcing rib 1028 faces the top of the A-shaped structure. By providing the eighth reinforcing rib 1028, the structural strength of the inner plate body 101 can be further improved.

[0064] In one embodiment, the A-shaped structure formed by a pair of first reinforcing ribs 1021 can also be used in conjunction with other reinforcing ribs. That is, a second reinforcing rib 1022, a third reinforcing rib 1023, and a fourth reinforcing rib 1024 are provided on each side of the pair of first reinforcing ribs 1021 that are far apart from each other along the second direction X. One end of the second reinforcing rib 1022 is connected to the vertex. The first reinforcing ribs 1021, the second reinforcing ribs 1022, the third reinforcing ribs 1023, and the fourth reinforcing ribs 1024 are connected end to end in sequence to form a ring structure.

[0065] In this embodiment, as Figure 6As shown, on the two outer sides of the A-shaped structure formed by a pair of first reinforcing ribs 1021, second reinforcing ribs 1022, third reinforcing ribs 1023 and fourth reinforcing ribs 1024 are respectively arranged. The second reinforcing ribs 1022, third reinforcing ribs 1023 and fourth reinforcing ribs 1024 are all bonded and fixed to the inner plate body 101 by structural adhesive 9. The following is a specific description using one side of the A-shaped structure as an example. One end of the second reinforcing rib 1022 is connected and fixed to the end of the first reinforcing rib 1021 near the first side 1010. One end of the fourth reinforcing rib 1024 is connected and fixed to the end of the first reinforcing rib 1021 near the second side 1020. The ends of the second reinforcing rib 1022 and the fourth reinforcing rib away from the first reinforcing rib 1021 are respectively connected and fixed to both ends of the third reinforcing rib 1023. The specific shape of the third reinforcing rib 1023 is adaptively adjusted according to the specific shape of the inner plate body 101.

[0066] Through the aforementioned connection, the first reinforcing rib 1021, the second reinforcing rib 1022, the third reinforcing rib 1023, and the fourth reinforcing rib 1024 on the inner panel body 101 are connected end to end, forming a closed annular structure. Symmetrically on the other side of the A-shaped structure, the corresponding first reinforcing rib 1021, second reinforcing rib 1022, third reinforcing rib 1023, and fourth reinforcing rib 1024 also form another closed annular structure. The two annular structures are approximately symmetrically arranged about the central axis of the inner panel body 101 along the first direction Y. In this way, the load from the mounting area of ​​the hinge assembly 5 can be distributed to the inner panel body 101 through the second reinforcing rib 1022, third reinforcing rib 1023, and fourth reinforcing rib 1024 using the annular structure, thereby increasing the strength of the inner panel body 101.

[0067] In one embodiment, such as Figure 6 As shown, a fifth reinforcing rib 1025 and a sixth reinforcing rib 1026 are also provided between the second reinforcing rib 1022 and the fourth reinforcing rib 1024. The fifth reinforcing rib 1025 and the sixth reinforcing rib 1026 are spaced apart along the direction from the first side 1010 to the second side 1020 of the inner plate body 101 and extend along the second direction X. The two ends of the fifth reinforcing rib 1025 and the sixth reinforcing rib 1026 are respectively connected to the first reinforcing rib 1021 and the third reinforcing rib 1023.

[0068] In one embodiment, such as Figure 6 As shown, the included angle between a pair of first reinforcing ribs 1021 is α, and satisfies: 15°≤α≤25°; and / or, the distance between the fourth reinforcing rib 1024 and the fifth reinforcing rib 1025 along the first direction Y is L1, the distance between the fifth reinforcing rib 1025 and the sixth reinforcing rib 1026 along the first direction Y is L2, and the maximum distance between the sixth reinforcing rib 1026 and the second reinforcing rib 1022 along the first direction Y is L3, and satisfies: L1=0.8 L2~1.2 L2=1.8 L3~2.2 L3.

[0069] In this embodiment, the distance between the fourth reinforcing rib 1024 and the fifth reinforcing rib 1025 is L1, which refers to the distance between the center line of the fourth reinforcing rib 1024 extending along the second direction X and the center line of the fifth reinforcing rib 1025 extending along the second direction X. The distance between the fifth reinforcing rib 1025 and the sixth reinforcing rib 1026 is L2, which refers to the distance between the center line of the fifth reinforcing rib 1025 extending along the second direction X and the center line of the sixth reinforcing rib 1026 extending along the second direction X. The maximum distance between the sixth reinforcing rib 1026 and the second reinforcing rib 1022 is L3, which refers to the maximum distance between the center line of the sixth reinforcing rib 1026 extending along the second direction X and the center line of the second reinforcing rib 1022 extending along the second direction X.

[0070] Based on the above, the included angle α between a pair of first reinforcing ribs 1021 is limited to 15° to 25°. This angle range ensures that the A-shaped structure formed by the pair of first reinforcing ribs 1021 can provide a better load transfer path and avoid the A-shaped structure occupying too much space on the inner plate body 101. When α < 15°, the A-shaped structure formed by the pair of first reinforcing ribs 1021 is too sharp, which can easily lead to stress concentration in the intersection area of ​​the pair of first reinforcing ribs 1021, and fatigue cracking can easily occur under repeated impacts. When α > 25°, the A-shaped structure formed by the pair of first reinforcing ribs 1021 tends to be gentle, which is not conducive to transferring and resisting the impact load of the vehicle along the first direction Y. At the same time, an excessively large angle may make the dimension of the end of the A-shaped structure facing the first side 1010 along the second direction X too large, resulting in the A-shaped structure occupying too much space on the inner plate body 101.

[0071] The spacing L1 between the fourth reinforcing rib 1024 and the fifth reinforcing rib 1025 is set to be equal to 0.8. L2~1.2 L2, and equal to 1.8 L3~2.2 L3 results in a relatively small maximum spacing between the sixth reinforcing rib 1026 and the second reinforcing rib 1022, allowing for a denser arrangement of other reinforcing ribs in the area surrounding the second reinforcing rib 1022 to form localized reinforcement and meet the installation requirements of the hinge assembly 5. L1 and L2, being relatively large, provide more uniform support for the inner panel body 101, thus achieving higher structural performance with less material. When the values ​​of L1 and L2 are too small relative to L3, the reinforcing ribs become too densely packed, unnecessarily increasing the weight of the inner panel 1 and hindering the overall lightweight design of the hood. When the values ​​of L1 and L2 are too large relative to L3, the reinforcing ribs become too sparse, potentially leading to insufficient local stiffness in the inner panel body 101 and affecting the overall structural performance of the inner panel 1.

[0072] It should be noted that, in this embodiment, the included angle α between a pair of first reinforcing ribs 1021 can be any value among 15°, 17°, 19°, 21°, 23°, and 25°, or a value between any two values.

[0073] In one embodiment, a seventh reinforcing rib 1027 is provided between the fifth reinforcing rib 1025 and the sixth reinforcing rib 1026. The seventh reinforcing rib 1027 extends along the first direction Y and its two ends are connected to the fifth reinforcing rib 1025 and the sixth reinforcing rib 1026, respectively. The maximum distance between the seventh reinforcing rib 1027 and the first reinforcing rib 1021 along the second direction X is L4, and the maximum distance between the seventh reinforcing rib 1027 and the third reinforcing rib 1023 along the second direction X is L5, satisfying L4 = 0.8. L5~1.2 L5.

[0074] In this embodiment, as Figure 6 As shown, the maximum spacing between the seventh reinforcing rib 1027 and the first reinforcing rib 1021 is L4, which refers to the maximum spacing between the center line of the seventh reinforcing rib 1027 extending along the first direction Y and the center line of the first reinforcing rib 1021 extending along the first direction Y. The maximum spacing between the seventh reinforcing rib 1027 and the third reinforcing rib 1023 is L5, which refers to the maximum spacing between the center line of the seventh reinforcing rib 1027 extending along the first direction Y and the center line of the third reinforcing rib 1023 extending along the first direction Y.

[0075] By limiting L4 to 0.8 L5~1.2 L5 ensures that L4 and L5 are equal or substantially equal, meaning that the seventh stiffener 1027 is approximately positioned midway between the first stiffener 1021 and the third stiffener 1023 in the second direction X. This allows the load transmitted by the first stiffener 1021 or the third stiffener 1023 along the first direction Y to be redirected more quickly through the fifth stiffener 1025 and the sixth stiffener 1026, and then through the seventh stiffener 1027 to the stiffener extending along the first direction Y on the other side, further improving structural performance. When L4 < 0.8L5, the grid area near the third stiffener 1023 becomes excessively large, resulting in weakened local stiffness and disrupted load balance along the second direction X. Conversely, when L4 > 1.2L5, the same effect occurs, weakening local stiffness and disrupting load balance along the second direction X.

[0076] Overall, a pair of first reinforcing ribs 1021, together with connecting ribs, form an A-shaped structure. A portion of the first reinforcing rib 1021, a portion of the fourth reinforcing rib 1024, a portion of the third reinforcing rib 1023, and a portion of the fifth reinforcing rib 1025 enclose a U-shaped reinforcing rib structure. A portion of the first reinforcing rib 1021, a portion of the fifth reinforcing rib 1025, a portion of the third reinforcing rib 1023, a portion of the second reinforcing rib 1022, and a portion of the seventh reinforcing rib 1027 combine to form a H-shaped reinforcing rib structure. This allows for flexible adaptation to the varying performance requirements of different vehicle models. Furthermore, by adjusting the thickness of each reinforcing rib, a balance between the weight and performance of the inner panel 1 can be achieved while maintaining its structural performance.

[0077] In one embodiment, the inner plate body 101 is provided with a ventilation opening 104, which is located between the second reinforcing rib 1022 and the sixth reinforcing rib 1026; and / or, the inner plate body 101 is provided with a first weight-reducing hole 105, which is located between the fifth reinforcing rib 1025 and the sixth reinforcing rib 1026; and / or, the inner plate body 101 is provided with a second weight-reducing hole 106, which is located between the fourth reinforcing rib 1024 and the fifth reinforcing rib 1025.

[0078] In this embodiment, as Figure 2 , Figure 6 As shown, the ventilation opening 104 is connected to the body of the carrier through a pipe. The inner plate body 101 is provided with a first weight reduction hole 105 and a second weight reduction hole 106. The first weight reduction hole 105 and the second weight reduction hole 106 are located in the central area of ​​the grid formed by the reinforcing ribs. Appropriate removal of material in the central area has little impact on the overall rigidity of the inner plate 1 and can also achieve the lightweight design of the inner plate 1.

[0079] In one embodiment, the inner plate body 101 is provided with a hinge reinforcing plate 4, and the hinge reinforcing plate 4 is provided with a plurality of mounting holes 6 arranged in an array. The hinge assembly 5 can be connected to the hinge reinforcing plate 4 through different mounting holes 6.

[0080] In this embodiment, as Figure 3 , Figure 4 As shown, the hinge reinforcement plate 4 can be fixed to the inner plate body 101 by means of adhesive bonding, bolt connection, etc. The hinge reinforcement plate 4 can be used as an independent component to effectively enhance the local strength of the inner plate body 101 and facilitate the assembly of the inner plate body 101 with the hinge assembly 5. Preferably, two hinge reinforcement plates 4 are provided, and the two hinge reinforcement plates 4 are spaced apart along the second direction X of the inner plate body 101. Multiple mounting holes 6 are formed on the hinge reinforcement plate 4 in a regular array, which is preferably a matrix layout with at least two rows and at least two columns. The mounting holes 6 can be threaded holes. The hinge assembly 5 can be different types of hinges such as a swivel hinge or a four-bar hinge. The hinge assembly 5 is connected to the hinge reinforcement plate 4 by fasteners such as bolts, so that the hinge assembly 5 can be assembled onto the hinge reinforcement plate 4.

[0081] Specifically, the hinge assembly 5 includes an interconnected hinge hood side bracket 501 and a hinge body side bracket 502. The hinge hood side bracket 501 is fixedly connected to the hinge reinforcement plate 4 via fasteners and mounting holes 6, while the hinge body side bracket 502 is fixedly connected to the vehicle body structure. During actual hood assembly, the hinge assembly 5 can be adapted to different vehicle models by changing its specific dimensions. The array of mounting holes 6 allows the hinge hood side bracket 501 to be adjusted within a certain range in the first direction Y and the second direction X. This enables operators to select a set of holes from the array of mounting holes 6 on the hinge reinforcement plate 4 to achieve a secure connection, based on the dimensions of different vehicle models. Thus, the inner plate 1, used in conjunction with the hinge reinforcement plate 4, can be adapted to multiple vehicle models on the same platform without requiring the development of molds for hinge reinforcement plates 4 and inner plate 1 with different mounting hole positions for each vehicle model. Furthermore, it eliminates the need to modify the vehicle body structure, thereby reducing development and manufacturing costs.

[0082] Optionally, four mounting holes 6 are spaced apart along the first direction Y, with a spacing of 0mm to 100mm between adjacent mounting holes 6. The four mounting holes 6 are arranged in three rows spaced apart along the second direction X, with a spacing of 13mm to 17mm between adjacent mounting holes 6 spaced apart along the second direction X. With this configuration, the hinge hood side bracket 501 can be connected to the hinge reinforcing plate 4 via two bolts. Furthermore, by selecting different bolt hole positions, the stroke along the first direction Y and / or the second direction X can be adjusted to match different vehicle body lengths and / or widths.

[0083] In one embodiment, the inner panel body 101 is provided with a first interface 107 for installing a locking member 7; the inner panel body 101 is also provided with a second interface 108 for installing a buffer member 8, and the surface of the buffer member 8 away from the inner panel body 101 is connected to the outer panel 2.

[0084] In this embodiment, as Figure 2 , Figure 5 As shown, both the first interface 107 and the second interface 108 are located near the first side 1010 of the inner panel body 101. The locking component 7 refers to the main lock or auxiliary lock of the hood. The first interface 107 is a modular locking interface, which makes the first interface 107 compatible with mainstream locking mechanisms such as mechanical locks, electromagnetic locks, and intelligent sensor locks. The specific structure of the locking component 7 can be adapted to actual needs. The locking component 7 can be used with bolts through the first interface 107, and further, structural adhesive 9 can be applied between the locking component and the inner panel body 101 to achieve bonding and fixation. The buffer component 8 can be an elastomer material or a pillar-type buffer. By setting the buffer component 8, the impact vibration of the hood can be effectively reduced, and the service life of the hood can be extended. The second interface 108 can be a metal base with a threaded hole. When installing the buffer component 8, one end of the buffer component 8 can be directly screwed into the threaded hole, and further, structural adhesive 9 can be applied between the buffer component and the inner panel body 101 to achieve bonding and fixation.

[0085] In one embodiment, the inner panel 1 includes an energy-absorbing region 110, a load-bearing region 120, and a mounting region 130. The energy-absorbing region 110 is located on the side of the fourth reinforcing rib 1024 facing the first side 1010 of the inner panel body 101. The load-bearing region 120 is correspondingly arranged with the area formed by the second reinforcing rib 1022, the third reinforcing rib 1023, and the fourth reinforcing rib 1024. The mounting region 130 is correspondingly arranged with the first interface 107, the second interface 108, and the hinge reinforcing plate 4. The ply angle of the ply in the energy-absorbing region 110 is 0° or 90°, and the single-sided layer density of the ply in the energy-absorbing region 110 is 150 g / m². 2 ~200g / m 2 ; and / or, the ply angle of the load-bearing zone 120 is ±45°, and the single-layer density of the ply in the load-bearing zone 120 is 300 g / m². 2 ~400g / m 2 ; and / or, embedded parts are provided in the ply of the installation area 130.

[0086] In this embodiment, as Figure 7As shown, a carbon fiber layup gradient design is adopted to address the stress differences in different areas of the inner panel body 101. The energy-absorbing zone 110 is typically the area of ​​the inner panel 1 furthest from the passenger compartment. During a collision, especially in situations where pedestrians are being protected, the energy-absorbing zone 110 serves as the primary energy absorption area. Specifically, the energy-absorbing zone 110 uses a blend of low-area-density unidirectional carbon fiber and aramid fiber. The main direction of the fiber layup in this area is set to 0° or 90° relative to the first direction Y or the second direction X. This layup method gives the material higher tensile strength and modulus in this direction, facilitating energy absorption through controlled crushing deformation in a frontal collision. Furthermore, the unidirectional surface density of the layup in this area is set in a lower range of 150g / m² to 200g / m². The lower fiber surface density helps reduce local stiffness in the initial stage of deformation, promoting stable progressive crushing, thereby optimizing energy absorption efficiency and achieving lightweighting of this area.

[0087] The load-bearing region 120 corresponds to the area roughly enclosed by a pair of second reinforcing ribs 1022, a pair of third reinforcing ribs 1023, and a pair of fourth reinforcing ribs 1024 on the plane of the inner panel body 101. As the main load-bearing frame of the inner panel 1, the load-bearing region 120 preferably uses a ±45° fiber layup. This layup method gives the composite panel good in-plane shear performance and a relatively balanced biaxial load-bearing capacity, effectively resisting multi-directional loads transmitted from the reinforcing ribs 102, and significantly improving the torsional stiffness and bending stiffness of the inner panel body 101. Furthermore, the single-layer surface density of the layup in this region is set to a relatively high range of 300g / m² to 400g / m². The high fiber content ensures sufficient strength and stiffness in this critical area to guarantee the overall structural performance of the inner panel 1.

[0088] Multiple mounting areas 130 are arranged on the inner panel body 101. Different mounting areas 130 correspond to the positions of the hinge reinforcement plate 4, the first interface 107 for mounting the fastener 7, and the second interface 108 for mounting the buffer 8, respectively. Metal embedded parts are pre-embedded within the layers of the mounting areas 130. These embedded parts may have threaded holes. On the one hand, the embedded parts can provide localized reinforcement to the mounting areas 130 of the inner panel body 101; on the other hand, it facilitates the subsequent installation of the hinge reinforcement plate 4, the fastener 7, and the buffer 8 onto the inner panel body 101.

[0089] Under the above configuration, compared to the existing carbon fiber hood's inner panel 1 which uses a monolithic layup, there is a conflict between lightweighting and localized strength, as well as the problem of brittleness and easy fracture at the leading edge. The inner panel 1 provided in this embodiment adopts different layup designs for different stress zones according to the actual stress zones, so as to balance lightweighting and structural reliability.

[0090] Secondly, this application provides a vehicle, including a vehicle body and a hood as described above, with an inner panel 1 connected to the vehicle body.

[0091] In this embodiment, the vehicle is equipped with the aforementioned hood. The inner panel 1, outer panel 2, and frame 3 of the hood are all made of carbon fiber, giving the hood the advantages of lightweight design and flexible shape. Furthermore, by setting the frame 3 between the inner panel 1 and the outer panel 2, with the inner panel 1 connected to the first end face 301 of the frame 3 via a connecting surface 1011, and the outer panel 2 connected to the second end face 302 of the frame 3, the frame 3 enables the connection and transition between the inner panel 1 and the outer panel 2. When the shape of the outer panel 2 changes, the shape and size of the first end face 301 of the frame 3 can be retained. Only the shape and size of the second end face 302 and the side face 303 of the frame 3 need to be adjusted to fit the shape of the outer panel 2. Thus, thanks to the frame 3, when the shape of the outer panel 2 changes, there is no need to redesign the shape of the inner panel 1, thereby significantly reducing the overall production cost of the hood and shortening the hood development cycle.

[0092] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and all such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A machine cover, characterized in that, include: The inner panel (1), the outer panel (2) and the frame (3) are all made of carbon fiber material, and the frame (3) is located between the inner panel (1) and the outer panel (2); The inner panel (1) includes an inner panel body (101), and a connecting surface (1011) is provided on the surface of the inner panel body (101) facing the frame (3). The frame (3) has a first end face (301) and a second end face (302) facing each other, and a side face (303) connected between the first end face (301) and the second end face (302). The first end face (301) faces the connecting surface (1011) and is connected to the connecting surface (1011). The second end face (302) faces the outer plate (2) and is connected to the outer plate (2). The inner plate body (101) has a first side (1010) and a second side (1020) opposite each other along a first direction (Y), and a hinge assembly (5) is mounted on the second side (1020) of the inner plate body (101). The inner plate body (101) is provided with a hinge reinforcement plate (4), and the hinge reinforcement plate (4) is provided with a plurality of mounting holes (6) arranged in an array. The hinge assembly (5) can be connected to the hinge reinforcement plate (4) through different mounting holes (6).

2. The cover according to claim 1, characterized in that, The connecting surface (1011) is arranged around the periphery of the inner plate body (101), and the frame (3) is an annular frame adapted to the shape of the connecting surface (1011).

3. The cover according to claim 1, characterized in that, The inner plate body (101) has a receiving cavity (1012) on its surface facing the outer plate (2), and the inner plate (1) also includes a reinforcing rib (102) disposed in the receiving cavity (1012). The reinforcing rib (102) has a supporting rib (103) on its surface facing the outer plate (2), and the supporting rib (103) is connected to the outer plate (2) on its surface facing the outer plate (2).

4. The cover according to claim 3, characterized in that, The reinforcing rib (102) includes a pair of first reinforcing ribs (1021) arranged at an angle, and the vertex of the angle formed by the pair of first reinforcing ribs (1021) faces the second side (1020) of the inner plate body (101). The pair of first reinforcing ribs (1021) are connected by a connecting rib (1029) near the middle.

5. The cover according to claim 4, characterized in that, A pair of first reinforcing ribs (1021) are provided with a second reinforcing rib (1022), a third reinforcing rib (1023) and a fourth reinforcing rib (1024) on the side of each pair of first reinforcing ribs (1021) that are far apart from each other along the second direction (X), and one end of the second reinforcing rib (1022) is connected to the vertex; The first reinforcing rib (1021), the second reinforcing rib (1022), the third reinforcing rib (1023), and the fourth reinforcing rib (1024) are connected end to end to form a ring structure.

6. The cover according to claim 5, characterized in that, A fifth reinforcing rib (1025) and a sixth reinforcing rib (1026) are provided between the second reinforcing rib (1022) and the fourth reinforcing rib (1024). The fifth reinforcing rib (1025) and the sixth reinforcing rib (1026) are spaced apart along the direction from the first side (1010) to the second side (1020) of the inner plate body (101) and extend along the second direction (X). The two ends of the fifth reinforcing rib (1025) and the sixth reinforcing rib (1026) are respectively connected to the first reinforcing rib (1021) and the third reinforcing rib (1023).

7. The cover according to claim 6, characterized in that, The included angle between a pair of first reinforcing ribs (1021) is α, and satisfies: 15°≤α≤25°; And / or, the distance between the fourth reinforcing rib (1024) and the fifth reinforcing rib (1025) along the first direction (Y) is L1, the distance between the fifth reinforcing rib (1025) and the sixth reinforcing rib (1026) along the first direction (Y) is L2, and the maximum distance between the sixth reinforcing rib (1026) and the second reinforcing rib (1022) along the first direction (Y) is L3, and satisfies: L1=0.8*L2~1.2*L2=1.8*L3~2.2*L3.

8. The cover according to claim 6, characterized in that, A seventh reinforcing rib (1027) is provided between the fifth reinforcing rib (1025) and the sixth reinforcing rib (1026). The seventh reinforcing rib (1027) extends along the first direction (Y) and its two ends are respectively connected to the fifth reinforcing rib (1025) and the sixth reinforcing rib (1026). The maximum distance between the seventh reinforcing rib (1027) and the first reinforcing rib (1021) along the second direction (X) is L4, and the maximum distance between the seventh reinforcing rib (1027) and the third reinforcing rib (1023) along the second direction (X) is L5, and satisfies: L4 = 0.8 * L5 ~ 1.2 * L5.

9. The cover according to claim 6, characterized in that, The inner plate body (101) is provided with a ventilation opening (104), which is located between the second reinforcing rib (1022) and the sixth reinforcing rib (1026); And / or, the inner plate body (101) is provided with a first weight reduction hole (105), the first weight reduction hole (105) being located between the fifth reinforcing rib (1025) and the sixth reinforcing rib (1026); And / or, the inner plate body (101) is provided with a second weight-reducing hole (106), the second weight-reducing hole (106) being located between the fourth reinforcing rib (1024) and the fifth reinforcing rib (1025).

10. The cover according to claim 5, characterized in that, The inner plate body (101) is provided with a first interface (107), which is used to install a locking fastener (7). The inner plate body (101) is also provided with a second interface (108), which is used to install a buffer (8). The surface of the buffer (8) away from the inner plate body (101) is connected to the outer plate (2).

11. The cover according to claim 10, characterized in that, The inner panel body (101) includes an energy-absorbing area (110), a bearing area (120), and an installation area (130). The energy-absorbing area (110) is located on the side of the fourth reinforcing rib (1024) facing the first side (1010) of the inner panel body (101). The bearing area (120) is correspondingly provided with the area enclosed by the second reinforcing rib (1022), the third reinforcing rib (1023), and the fourth reinforcing rib (1024). The installation area (130) is correspondingly provided with the first interface (107), the second interface (108), and the hinge reinforcing plate (4). The ply angle of the energy-absorbing region (110) is 0° or 90°, and the single-sided layer density of the ply in the energy-absorbing region (110) is 150 g / m². 2 ~200g / m 2 ; And / or, the ply angle of the load-bearing region (120) is ±45°, and the single-sided layer density of the ply in the load-bearing region (120) is 300 g / m². 2 ~400g / m 2 ; And / or, embedded parts are provided in the ply of the installation area (130).

12. A vehicle, characterized in that, include: Vehicle body; The hood according to any one of claims 1-11, wherein the inner plate (1) is connected to the vehicle body.

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