Bottom guard plate assembly and vehicle

By designing the underbody adjustment mechanism and cooling mechanism, the problems of poor aerodynamic performance and insufficient heat dissipation performance of the underbody protection assembly in the vehicle were solved, achieving aerodynamic optimization and heat dissipation cooling effect under different driving conditions.

CN121133570APending Publication Date: 2025-12-16CHINA FAW CO LTD
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Patent Information

Application Number
CN202511467741.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-10-14
Publication Date
2025-12-16

AI Technical Summary

Technical Problem

The existing underbody protection assembly lacks flexible adjustment capabilities, resulting in poor aerodynamic performance of the vehicle and affecting the chassis's heat dissipation performance.

Method used

A bottom guard assembly including a guard adjustment mechanism and a cooling mechanism was designed. The angle between the guard and the chassis can be adjusted by the guard adjustment component, and the cooling air duct can be folded or turned outward by the air duct adjustment component, so as to optimize aerodynamic performance and heat dissipation and cooling.

Benefits of technology

The vehicle's aerodynamic performance is optimized under different driving conditions, and the engine compartment and braking system in the chassis are effectively cooled according to the heat dissipation requirements to ensure reliable and stable vehicle operation.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to the technical field of vehicles, and particularly discloses a bottom guard plate assembly and a vehicle, the bottom guard plate assembly comprises a guard plate body, a guard plate adjusting mechanism and a cooling mechanism, the guard plate body is used for covering a chassis, a mounting opening is formed in the guard plate body, the first end of the guard plate body is hinged to the chassis, and the guard plate adjusting mechanism comprises a guard plate adjusting part; the protection plate adjusting part is used for adjusting the angle between the protection plate body and the chassis, the cooling mechanism comprises a cooling air duct and an air duct adjusting part, the cooling air duct is movably arranged at the mounting opening, the air duct adjusting part is used for controlling the cooling air duct to be folded or turned outwards, and the air inlet end of the cooling air duct is completely located above the protection plate body during folding. The air inlet end of the cooling air duct is at least partially located below the protection plate body when turned outwards and communicates the upper side and the lower side of the protection plate body; the vehicle comprises the bottom guard plate assembly. The bottom protection plate always enables the vehicle to exert better aerodynamic performance, and also can perform heat dissipation and cooling on an engine compartment, a brake system and the like in a chassis, so that the vehicle is ensured to run reliably and stably.
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Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a bottom protection plate assembly and a vehicle. BACKGROUND

[0002] The bottom protection plate assembly is generally installed at the chassis part of the vehicle, thereby reliably and effectively protecting the chassis components.

[0003] In the prior art, the bottom protection plate assembly does not have a flexible adjustment function, so that the aerodynamic performance of the chassis part after installation is poor. In addition, the bottom protection plate assembly is arranged on the chassis, which also affects the heat dissipation performance of the chassis part. The heat generated by the engine compartment, brake system and the like on the chassis is affected, which is not conducive to the overall heat dissipation and cooling of the chassis. SUMMARY

[0004] The purpose of the present application is to provide a bottom protection plate assembly, which can make the vehicle have better aerodynamic performance, and can also cool the engine compartment, brake system and the like in the chassis, thereby ensuring the reliable and stable driving of the vehicle.

[0005] A bottom protection plate assembly comprises:

[0006] A protection plate body is arranged on the chassis, and the protection plate body is provided with a mounting opening. The first end of the protection plate body is hingedly connected to the chassis.

[0007] A protection plate adjusting mechanism is arranged between the second end of the protection plate body and the chassis, and the protection plate adjusting mechanism is used to adjust the angle between the protection plate body and the chassis.

[0008] A cooling mechanism comprises a cooling air duct and an air duct adjusting member. The cooling air duct is movably arranged in the mounting opening, and the air duct adjusting member is used to control the folding or turning out of the cooling air duct. Wherein,

[0009] When the cooling air duct is folded, the air inlet end of the cooling air duct is completely located above the protection plate body.

[0010] When the cooling air duct is turned out, the air inlet end of the cooling air duct is at least partially located below the protection plate body, and the part of the cooling air duct located below the protection plate body communicates the upper and lower sides of the protection plate body.

[0011] Preferably, the cooling air duct comprises an air duct body and a flow guide plate. The air duct body is fixedly provided with a hinge shaft, the side end of the mounting opening is provided with a hinge part, the hinge shaft is hingedly connected to the hinge part, the flow guide plate is arranged at the air inlet end of the air duct body, and the air duct adjusting member is used to control the folding or turning out of the air duct body.

[0012] As preferred, the air duct adjusting member comprises a driving motor and a transmission assembly, the housing of the driving motor is fixed inside the apron body, the output shaft of the driving motor is in transmission connection with the hinged shaft through the transmission assembly, and rotation of the output shaft of the driving motor can drive the hinged shaft to rotate through the transmission assembly, so as to control the folding or turning out of the air duct body.

[0013] As preferred, the cooling mechanism further comprises a temperature sensor, the temperature sensor is in communication connection with the air duct adjusting member through a control element, the temperature sensor is used for detecting the temperature of the engine compartment and the brake system on the chassis, and the control element can control the action of the air duct adjusting member according to the temperature data of the temperature sensor, so as to control the folding or turning out of the cooling air duct.

[0014] As preferred, the cooling air duct comprises a first cooling air duct and a second cooling air duct arranged on both sides of the first cooling air duct, the air outlet end of the first cooling air duct is arranged corresponding to the engine compartment on the chassis, and the air outlet end of the second cooling air duct is arranged corresponding to the brake system on the chassis.

[0015] As preferred, the first end of the apron body is provided with a first ball head, the chassis is provided with a first ball socket corresponding to the first ball head, and the first ball head is movably arranged in the first ball socket.

[0016] As preferred, the air duct adjusting member comprises a telescopic rod, the second end of the apron body is provided with a second ball head, the fixed end of the telescopic rod is fixed to the chassis, the telescopic end of the telescopic rod is provided with a second ball socket corresponding to the second ball head, and the second ball head is movably arranged in the second ball socket.

[0017] As preferred, the apron adjusting mechanism further comprises a speed sensor, the speed sensor is in communication connection with the apron adjusting member through a control element, the speed sensor is used for detecting the driving speed, and the control element can control the action of the apron adjusting member according to the speed data of the speed sensor, so as to adjust the angle between the apron body and the chassis.

[0018] As preferred, the bottom apron assembly further comprises:

[0019] an angle sensor for detecting the angle between the apron body and the chassis;

[0020] a posture sensor for detecting the pitch angle and roll angle of the chassis.

[0021] A vehicle comprises:

[0022] a chassis;

[0023] The underbody protection plate assembly as claimed in any one of the preceding claims, wherein the protection plate body is arranged to cover below the chassis.

[0024] Advantages:

[0025] The underbody protection plate assembly provided by the application can adjust the angle of the protection plate body relative to the chassis through the protection plate adjusting mechanism, thereby ensuring that the vehicle has better aerodynamic performance in different driving states. In addition, the cooling air duct can be folded or turned out relative to the protection plate body through the cooling mechanism driven by the air duct adjusting member. When the cooling air duct is folded, the air inlet end of the cooling air duct is completely located above the protection plate body, the air inlet end of the cooling air duct is completely withdrawn above the protection plate body, and the cooling air duct does not function. When the cooling air duct is turned out, the air inlet end of the cooling air duct is at least partially located below the protection plate body, and the part of the cooling air duct located below the protection plate body communicates the upper and lower sides of the protection plate body, so that the air below the protection plate body can enter the chassis area above the protection plate body through the cooling air duct, thereby cooling and radiating the engine compartment, brake system and the like in the chassis according to the cooling and radiating requirement, and ensuring that the vehicle runs reliably and stably.

[0026] The vehicle provided by the application comprises the above-mentioned underbody protection plate assembly, which can ensure that the vehicle has better aerodynamic performance in different driving states, and can also cool and radiate the engine compartment, brake system and the like in the chassis according to the cooling and radiating requirement, thereby ensuring that the vehicle runs reliably and stably. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 FIG. 1 is a structural schematic view of the underbody protection plate assembly provided by the application;

[0028] Figure 2 FIG. 2 is a side view of the structure of the underbody protection plate assembly provided by the application;

[0029] Figure 3 FIG. 3 is a schematic view of the cooling air duct folding provided by the application;

[0030] Figure 4 FIG. 4 is a schematic view of the cooling air duct turning out provided by the application.

[0031] In the drawings:

[0032] 1, protection plate body; 11, mounting port; 12, hinged part; 131, first ball head; 132, first ball socket; 141, second ball head; 142, second ball socket;

[0033] 21, telescopic rod; 22, speed sensor;

[0034] 31, cooling air duct; 31A, first cooling air duct; 31B, second cooling air duct; 311, air duct body; 312, guide plate; 313, hinged shaft; 32, driving motor; 33, transmission assembly; 331, driving gear; 332, driven gear;

[0035] 4, control element; 41, angle sensor; 42, attitude sensor; 43, power supply. DETAILED DESCRIPTION

[0036] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0037] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and moreover, the "above", "above" and "above" of the first feature on the second feature include the first feature above and obliquely above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature on the second feature include the first feature below and obliquely below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0038] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0040] This embodiment provides a vehicle, which includes a chassis and an underbody protection assembly. (Refer to...) Figures 1 to 4 As shown, the bottom guard assembly includes a guard body 1, a guard adjustment mechanism, and a cooling mechanism. The guard body 1 covers the chassis and has a mounting opening 11. The first end of the guard body 1 is hinged to the chassis. The guard adjustment mechanism includes a guard adjustment component located between the chassis and the second end of the guard body 1, used to adjust the angle between the guard body 1 and the chassis. The cooling mechanism includes a cooling duct 31 and a duct adjustment component. The cooling duct 31 is movably disposed at the mounting opening 11, and the duct adjustment component controls the folding or outward rotation of the cooling duct 31. When the cooling duct 31 is folded, its air inlet is completely above the guard body 1. When the cooling duct 31 is outward rotated, its air inlet is at least partially below the guard body 1, and the portion of the cooling duct 31 below the guard body 1 connects the upper and lower sides of the guard body 1.

[0041] In this embodiment, the skid plate adjustment mechanism can adjust the angle of the skid plate body 1 relative to the chassis, thereby ensuring that the vehicle performs optimally in different driving conditions. Furthermore, by providing a cooling mechanism, the cooling duct 31 can be folded or folded outward relative to the skid plate body 1 by the duct adjustment component. When the cooling duct 31 is folded, the air inlet end of the cooling duct 31 is completely above the skid plate body 1; when the air inlet end of the cooling duct 31 is completely retracted above the skid plate body 1, the cooling duct 31 does not function. (See schematic diagram for reference.) Figure 3 As shown; when the cooling duct 31 is folded outward, the air inlet of the cooling duct 31 is at least partially located below the guard plate body 1. The portion of the cooling duct 31 located below the guard plate body 1 connects the upper and lower sides of the guard plate body 1, allowing air below the guard plate body 1 to enter the chassis area above the guard plate body 1 through the cooling duct 31. This allows for cooling of the engine compartment, braking system, and other components within the chassis according to cooling requirements, ensuring reliable and stable vehicle operation. (See schematic diagram below.) Figure 4 As shown. The vehicle provided in this embodiment includes the aforementioned underbody protection assembly, which on the one hand ensures that the vehicle performs well in different driving conditions, and on the other hand, can also cool the engine compartment, braking system, etc. in the chassis according to the heat dissipation and cooling requirements, ensuring reliable and stable vehicle operation.

[0042] In this embodiment, the cooling duct 31 includes a duct body 311 and a guide plate 312. The duct body 311 is fixedly provided with a hinge shaft 313, and a hinge portion 12 is provided on the side end of the mounting port 11. The hinge shaft 313 is hinged to the hinge portion 12. The guide plate 312 is provided at the air inlet end of the duct body 311. The duct adjustment component is used to control the duct body 311 to fold or fold outward. Specifically, when the duct body 311 is folded, the air inlet end of the duct body 311 is completely above the guard plate body 1; when the duct body 311 is folded outward, the air inlet end of the duct body 311 is at least partially below the guard plate body 1, and the portion of the duct body 311 below the guard plate body 1 connects the upper and lower sides of the guard plate body 1. It is understandable that by adjusting the different outward turning angles of the air duct body 311 relative to the guard plate body 1, the cross-sectional area of ​​the air inlet end of the air duct body 311 located at least partially below the guard plate body 1 is adjusted, thereby adjusting the air intake volume of the cooling air duct 31.

[0043] In this embodiment, the duct adjustment component includes a drive motor 32 and a transmission assembly 33. The housing of the drive motor 32 is fixed to the inner side of the protective plate body 1. The output shaft of the drive motor 32 is connected to the hinge shaft 313 via the transmission assembly 33. Rotation of the output shaft of the drive motor 32 can drive the hinge shaft 313 to rotate via the transmission assembly 33, thereby controlling the duct body 311 to fold or fold outward. Specifically, the transmission assembly 33 includes a drive gear 331 and a driven gear 332. Specifically, the drive gear 331 is fixedly sleeved on the output shaft of the drive motor 32, and the driven gear is fixedly sleeved on the hinge shaft 313. The drive gear 331 and the driven gear 332 are meshed together. Specifically, rotation of the output shaft of the drive motor 32 can sequentially drive the drive gear 331 and the driven gear 332 to rotate, thereby driving the hinge shaft 313 to rotate to achieve the folding or folding swinging action of the duct body 311.

[0044] Specifically, by changing the rotation direction of the output shaft of the drive motor 32, the duct body 311 can be switched between folding and folding outwards.

[0045] In some alternative embodiments, the transmission assembly 33 also includes a coupling. The output shaft of the drive motor 32 may be configured to be coaxial with the hinge shaft 313, in which case the connection between the output shaft of the drive motor 32 and the hinge shaft 313 can be achieved through a coupling.

[0046] In this embodiment, the cooling mechanism also includes a temperature sensor, which is communicatively connected to the air duct adjustment component via the control element 4. The temperature sensor is used to detect the temperature of the engine compartment and braking system on the chassis. The control element 4 can control the air duct adjustment component to operate according to the temperature data from the temperature sensor, thereby controlling the cooling air duct 31 to fold or fold outward. Specifically, the control element 4 controls the output shaft of the drive motor 32 to rotate according to the temperature data from the temperature sensor, thereby controlling the air duct body 311 to fold or fold outward, so that the air below the guard plate body 1 can enter the chassis area above the guard plate body 1 through the cooling air duct 31, and then cool the engine compartment, braking system, etc. in the chassis according to the heat dissipation and cooling requirements, ensuring reliable and stable vehicle operation.

[0047] In this embodiment, the cooling duct 31 includes a first cooling duct 31A and a second cooling duct 31B disposed on both sides of the first cooling duct 31A. The air outlet of the first cooling duct 31A is correspondingly disposed to the engine compartment on the chassis, and the air outlet of the second cooling duct 31B is correspondingly disposed to the braking system on the chassis. The air in the first cooling duct 31A can directly cool the engine compartment, and the air in the second cooling duct 31B can directly cool the braking system.

[0048] Optionally, only one complete hinge shaft 313 may be used, which is connected to both the first cooling air duct 31A and the second cooling air duct 31B. Alternatively, multiple hinge shafts 313 may be provided, with each of the first cooling air duct 31A and the second cooling air duct 31B connected to a hinge shaft 313.

[0049] In this embodiment, the first end of the guard plate body 1 is provided with a first ball head 131, and the chassis is correspondingly provided with a first ball socket 132. The first ball head 131 is movably disposed in the first ball socket 132. Specifically, the insertion and engagement of the first ball head 131 and the first ball socket 132 can realize a reliable hinge between the guard plate body 1 and the chassis, ensuring that the guard plate body 1 moves flexibly.

[0050] In this embodiment, the guard plate adjustment mechanism includes a telescopic rod 21. A second ball head 141 is provided at the second end of the guard plate body 1. The fixed end of the telescopic rod 21 is fixed to the chassis, and the telescopic end of the telescopic rod 21 is correspondingly provided with a second ball socket 142. The second ball head 141 is movably disposed within the second ball socket 142. Specifically, the telescopic end of the telescopic rod 21 extends and retracts relative to the fixed end, which can correspondingly control the swing of the guard plate body 1 relative to the chassis, thereby achieving angle adjustment. Specifically, the insertion and engagement of the second ball head 141 and the second ball socket 142 enables reliable swing adjustment between the guard plate body 1 and the chassis, ensuring flexible movement of the guard plate body 1.

[0051] Furthermore, the skid plate adjustment mechanism also includes a speed sensor 22. The speed sensor 22 is communicatively connected to the skid plate adjustment component via the control element 4. The speed sensor 22 is used to detect the driving speed, and the control element 4 can control the skid plate adjustment component to adjust the angle between the skid plate body 1 and the chassis based on the speed data from the speed sensor 22. Specifically, the control element 4 can control the telescopic end of the telescopic rod 21 to extend or retract to the fixed end based on the speed data from the speed sensor 22, thereby adjusting the angle between the skid plate body 1 and the chassis. Specifically, when the vehicle is traveling at low speed, the airflow under the vehicle is weak, and the impact on aerodynamic performance is small. When the speed sensor 22 detects a speed of less than 30 km / h, the control element 4 controls the telescopic end of the telescopic rod 21 to retract to the fixed end, that is, the second end of the skid plate body 1 is in the highest position, improving the vehicle's passability. When the speed sensor 22 detects a speed of not less than 30 km / h, the airflow speed under the vehicle is fast, which has a significant impact on aerodynamics. At this time, the telescopic end of the telescopic rod 21 is extended outward from the fixed end by the control element 4, which drives the second end of the guard plate body 1 to descend. An angle appears between the guard plate body 1 and the chassis, so that the guard plate body 1 as a whole plays a guiding role, thereby ensuring that the vehicle performs better aerodynamic performance under different driving conditions.

[0052] Specifically, the vehicle speed sensor is located on the vehicle's wheel hub or transmission system.

[0053] For example, the telescopic rod 21 can be an electric telescopic rod 21 or a hydraulic telescopic rod 21, and this application does not limit it.

[0054] Furthermore, the underbody protection assembly also includes an angle sensor 41 and an attitude sensor 42. The angle sensor 41 is used to detect the angle between the underbody protection body 1 and the chassis, and the attitude sensor 42 is used to detect the pitch and roll angles of the chassis. Specifically, the attitude sensor 42 can be configured as an accelerometer, gyroscope, etc., to detect the real-time attitude of the vehicle during driving; the angle sensor 41 detects the angle data between the underbody protection body 1 and the chassis in real time, which is convenient for tracking and adjustment.

[0055] In this embodiment, the bottom protection plate assembly also includes a power supply 43, which is used to supply power to the control element 4, various sensors and other electrical equipment to ensure reliable and stable operation.

[0056] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A bottom guard plate assembly, characterized in that, include: The protective plate body (1) is used to cover the chassis. The protective plate body (1) has an installation port (11). The first end of the protective plate body (1) is hinged to the chassis. The guard plate adjustment mechanism includes a guard plate adjustment member disposed between the chassis and the second end of the guard plate body (1), the guard plate adjustment member being used to adjust the angle between the guard plate body (1) and the chassis; The cooling mechanism includes a cooling air duct (31) and an air duct adjustment component. The cooling air duct (31) is movably disposed at the mounting port (11), and the air duct adjustment component is used to control the folding or outward rotation of the cooling air duct (31). When the cooling air duct (31) is folded, the air inlet end of the cooling air duct (31) is completely above the protective plate body (1); When the cooling air duct (31) is turned outward, the air inlet end of the cooling air duct (31) is at least partially located below the protective plate body (1), and the portion of the cooling air duct (31) located below the protective plate body (1) connects the upper and lower sides of the protective plate body (1).

2. The bottom guard plate assembly according to claim 1, characterized in that, The cooling air duct (31) includes an air duct body (311) and a guide plate (312). The air duct body (311) is fixedly provided with a hinge shaft (313). The side end of the mounting port (11) is provided with a hinge part (12). The hinge shaft (313) is hinged to the hinge part (12). The guide plate (312) is provided at the air inlet end of the air duct body (311). The air duct adjustment component is used to control the air duct body (311) to fold or fold outward.

3. The bottom guard plate assembly according to claim 2, characterized in that, The duct adjustment component includes a drive motor (32) and a transmission assembly (33). The housing of the drive motor (32) is fixed to the inner side of the guard plate body (1). The output shaft of the drive motor (32) is connected to the hinge shaft (313) through the transmission assembly (33). The rotation of the output shaft of the drive motor (32) can drive the hinge shaft (313) to rotate through the transmission assembly (33) to control the duct body (311) to fold or fold outward.

4. The bottom guard plate assembly according to claim 1, characterized in that, The cooling mechanism also includes a temperature sensor, which is connected to the air duct adjustment component via a control element (4). The temperature sensor is used to detect the temperature of the engine compartment and braking system on the chassis. The control element (4) can control the air duct adjustment component to move according to the temperature data of the temperature sensor, so as to control the cooling air duct (31) to fold or fold outward.

5. The bottom guard plate assembly according to claim 1, characterized in that, The cooling duct (31) includes a first cooling duct (31A) and a second cooling duct (31B) located on both sides of the first cooling duct (31A). The air outlet of the first cooling duct (31A) is corresponding to the engine compartment on the chassis, and the air outlet of the second cooling duct (31B) is corresponding to the braking system on the chassis.

6. The bottom guard plate assembly according to claim 1, characterized in that, The first end of the guard plate body (1) is provided with a first ball head (131), and the chassis is provided with a first ball socket (132) accordingly. The first ball head (131) is movably disposed in the first ball socket (132).

7. The bottom guard plate assembly according to claim 1, characterized in that, The guard plate adjustment mechanism includes a telescopic rod (21), and the second end of the guard plate body (1) is provided with a second ball head (141). The fixed end of the telescopic rod (21) is fixed to the chassis, and the telescopic end of the telescopic rod (21) is provided with a second ball socket (142). The second ball head (141) is movably disposed in the second ball socket (142).

8. The bottom guard plate assembly according to claim 1, characterized in that, The guard plate adjustment mechanism also includes a speed sensor (22), which is connected to the guard plate adjustment component via a control element (4). The speed sensor (22) is used to detect the driving speed. The control element (4) can control the action of the guard plate adjustment component according to the speed data of the speed sensor (22) to adjust the angle between the guard plate body (1) and the chassis.

9. The bottom guard plate assembly according to claim 1, characterized in that, The underbody assembly also includes: An angle sensor (41) is used to detect the angle between the guard plate body (1) and the chassis; An attitude sensor (42) is used to detect the pitch and roll angles of the chassis.

10. A vehicle, characterized in that, include: Chassis; The bottom guard assembly as described in any one of claims 1-9, wherein the guard body (1) is disposed under the chassis.