Front bottom guard plate and vehicle

Abstract

The present invention relates to the technical field of vehicles, and provides a front bottom guard plate and a vehicle, wherein the front bottom guard plate comprises: a windshield plate, comprising a windshield surface for cooperating with a front bumper of a vehicle, the windshield surface being able to slide with the front bumper and extend out of the bottom of the front bumper or retract into the front bumper; a bottom plate, fixedly connected to the bottom of the windshield plate and arranged at an angle to the windshield surface, and used to cover the bottom area of ​​the cab before the front wheels of the vehicle; a windshield lip, arranged on the windshield plate and protruding from the windshield surface, the windshield lip comprising a first side and a second side, the first side being connected to the windshield surface, and the second side extending toward the bottom plate. The front bottom guard plate provided by the present invention can significantly reduce the air resistance of the vehicle when driving at high speed, and the above-mentioned front bottom guard plate has a simple structure and low cost.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a front bottom guard plate and a vehicle. Background Art

[0002] Wind resistance is the resistance from the air when a vehicle is driving, which has an important impact on the performance of the vehicle. For example, when a heavy tractor is driving at high speed, the fuel consumption caused by aerodynamic resistance will account for more than half of the total vehicle fuel consumption. Therefore, commercial vehicle design also pays more and more attention to wind resistance performance.

[0003] Considering the passability on uneven roads, commercial vehicles are usually designed with a high ground clearance. However, when driving at high speeds, a large amount of airflow will be drawn into the bottom of the vehicle, causing turbulence in the bottom airflow, resulting in increased wind resistance and fuel consumption. If the ground clearance under high-speed conditions is adjusted by active suspension, the cost is too high and it is difficult to apply it in general models. By adding an air dam structure, it can also block the airflow from entering the bottom of the vehicle, but it will reduce the approach angle of the cab, resulting in poor passability.

[0004] Therefore, how to improve the vehicle's wind resistance performance while taking into account the vehicle's passability and cost is an important issue that needs to be solved urgently. Summary of the invention

[0005] The present invention provides a front bottom guard plate and a vehicle, which are used to solve the problem in the prior art that it is difficult to take into account both the vehicle wind resistance performance and the vehicle passability and manufacturing cost. The vehicle wind resistance performance can be improved while taking into account the vehicle passability and manufacturing cost.

[0006] The present invention provides a front bottom guard plate, comprising:

[0007] A windshield, comprising a windshield surface for cooperating with the front bumper of the vehicle, wherein the windshield surface can be slidably matched with the front bumper to extend out of the bottom of the front bumper or retract into the front bumper;

[0008] A bottom plate, fixedly connected to the bottom of the windshield and arranged at an angle to the windshield surface, for covering the bottom area of ​​the cab before the front wheels of the vehicle;

[0009] The windshield lip is arranged on the windshield plate and protrudes from the windshield surface. The windshield lip includes a first side and a second side. The first side is connected to the windshield surface, and the second side extends toward the bottom plate.

[0010] According to a front bottom guard plate provided by the present invention, the windshield plate also includes side surfaces located on opposite sides of the windshield surface, one end of the side surface is connected to the windshield surface, and the other end extends in a direction away from the windshield surface.

[0011] According to a front bottom guard plate provided by the present invention, the junction between the wind shield surface and the side surface is an arc transition.

[0012] According to a front bottom guard plate provided by the present invention, a portion from the first side of the windshield lip to an end away from the windshield surface is arranged as an arc surface; the windshield lip extends from the windshield surface to the side surface.

[0013] A front bottom guard plate provided according to the present invention further includes an air guide hole arranged between the bottom plate and the wind shielding surface.

[0014] According to a front bottom guard plate provided by the present invention, a plurality of guide grooves are arranged at intervals on the bottom surface of the bottom plate, one end of the guide groove is close to the air guide hole, and the other end thereof extends in a direction gradually away from the air guide hole.

[0015] According to a front bottom guard plate provided by the present invention, a plurality of guide vanes are arranged at intervals on the bottom surface of the bottom plate, the guide vanes protrude from the bottom surface of the bottom plate, and the guide grooves are formed between adjacent guide vanes.

[0016] According to a front bottom guard plate provided by the present invention, two opposite sides of the bottom plate are fixedly connected to the side surfaces.

[0017] According to a front bottom guard plate provided by the present invention, the wind shield lip protrudes from the wind shield surface by a distance of not less than 50 mm.

[0018] According to a front bottom guard plate provided by the present invention, the width of the air guide hole is 40 mm.

[0019] According to a front bottom guard plate provided by the present invention, the number of the guide grooves is not less than eight, the distance between adjacent guide grooves is not greater than 100 mm, and the height of the guide plate protruding from the bottom surface of the bottom plate is 15 mm.

[0020] The present invention also provides a vehicle, comprising a front bottom guard plate as described in any one of the above items; the windshield surface of the windshield is slidably matched with the front bumper of the vehicle, and the bottom plate covers the bottom area of ​​the cab before the front wheels of the vehicle.

[0021] According to a vehicle provided by the present invention, when the windshield is retracted into the front bumper, the bottom plate is arranged at an angle with the horizontal plane; when the windshield extends out from the bottom of the front bumper, the bottom plate is parallel to the horizontal plane.

[0022] According to a vehicle provided by the present invention, when the windshield surface is retracted into the front bumper, the angle between the bottom plate and the horizontal plane is 15 degrees.

[0023] A vehicle provided according to the present invention further includes:

[0024] A driving member, which is in driving connection with the front bottom guard plate and is used to drive the front bottom guard plate to move;

[0025] Speed ​​sensor, suitable for detecting the vehicle's travel speed;

[0026] The controller is communicatively connected with the driving member and the speed sensor, and when it is determined that the current vehicle speed does not exceed the set value, the controller controls the driving member to drive the front bottom guard plate to move so that the windshield surface is retracted into the front bumper; when it is determined that the current vehicle speed exceeds the set value, the controller controls the driving member to drive the front bottom guard plate to move so that the windshield surface is extended out of the bottom of the front bumper.

[0027] The front bottom guard plate and the vehicle provided by the present invention are as follows: when the vehicle is stationary or traveling at a low speed, the windshield surface of the windshield is retracted into the front bumper, so that the windshield surface does not affect the static appearance of the vehicle; and when the vehicle is traveling at a low speed, it is generally on an uneven road surface, and the windshield surface retracted into the front bumper does not affect the approach angle of the cab, thereby ensuring the passability of the vehicle on uneven roads; the windshield lip protruding from the windshield surface can block the airflow from flowing downwardly into the bottom of the vehicle to a certain extent, thereby playing a certain drag reduction role; when the vehicle is traveling at a high speed, the windshield extends out of the bottom of the front bumper, the ground clearance of the front end of the cab is reduced, and the windshield surface can block the airflow, thereby reducing the airflow flowing into the bottom of the vehicle; in addition, since the windshield lip protrudes from the windshield surface, when the vehicle is traveling at a high speed, the airflow is effectively prevented from moving downward and being drawn into the bottom of the vehicle under the obstruction of the windshield lip, and most of the airflow is guided out along the groove structure formed by the bottom of the front bumper, the windshield surface and the windshield lip, thereby significantly reducing the air resistance of the vehicle at a high speed, and the above-mentioned front bottom guard plate has a simple structure and a low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 This is one of the structural schematic diagrams of the cooperation between the front bottom guard plate and the front bumper provided in an embodiment of the present invention.

[0030] Figure 2 This is the second structural schematic diagram of the cooperation between the front bottom guard plate and the front bumper provided in an embodiment of the present invention.

[0031] Figure 3It is a schematic structural diagram of a front bottom guard plate provided in an embodiment of the present invention.

[0032] Figure 4 This is one of the flow field diagrams at the bottom of the cab when the windshield is retracted into the front bumper in the embodiment of the present invention.

[0033] Figure 5 This is the second flow field diagram of the bottom of the cab when the windshield is retracted into the front bumper in the embodiment of the present invention.

[0034] Figure 6 This is one of the flow field diagrams at the bottom of the cab when the windshield extends out from the bottom of the front bumper in the embodiment of the present invention.

[0035] Figure 7 This is the second flow field diagram of the bottom of the cab when the windshield extends out from the bottom of the front bumper in the embodiment of the present invention.

[0036] Reference numerals:

[0037] 10. Windshield; 100. Windshield surface; 101. Side; 11. Bottom plate; 12. Windshield lip; 13. Air guide hole; 14. Guide groove; 15. Guide vane; 20. Front bumper; 21. Driving part. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In the description of the embodiments of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "top", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the embodiments of the present invention.

[0040] In order to facilitate understanding of the front bottom guard plate and vehicle provided by the present invention, the application background thereof is first introduced. Wind resistance is the resistance from the air when the vehicle is traveling, which has an important impact on the vehicle performance. In commercial vehicles, considering the passability on uneven roads, the ground clearance of commercial vehicles is generally designed to be higher. However, when traveling at high speeds, a large amount of airflow will be drawn in from the bottom of the vehicle, causing turbulence in the bottom airflow, resulting in increased wind resistance and increased fuel consumption.

[0041] If the ground clearance under high-speed conditions is adjusted through active suspension, the cost is too high and it is difficult to apply it in general vehicle models; by adding an air dam structure, it can also block the airflow from entering the bottom of the vehicle, but it will reduce the approach angle of the cab, resulting in poor passability.

[0042] Therefore, how to improve the vehicle's wind resistance performance while taking into account the vehicle's passability and cost is an important issue that needs to be solved urgently.

[0043] Based on the above problems, an embodiment of the present invention provides a front bottom guard plate and a vehicle, which can improve the wind resistance performance of the vehicle while taking into account the vehicle's passability and manufacturing cost.

[0044] Combine the following Figure 1-Figure 7 The front underbody guard and vehicle of the present invention are described.

[0045] Reference Figures 1 to 3 A front bottom guard plate includes a windshield 10, a bottom plate 11 and a windshield lip 12; wherein the windshield 10 includes a windshield surface 100 for cooperating with a front bumper 20 of a vehicle, and the windshield surface 100 can slide with the front bumper 20 and extend out of the bottom of the front bumper 20 or retract into the front bumper 20; the bottom plate 11 is fixedly connected to the bottom of the windshield 10 and is arranged at an angle with the windshield 10 to cover the bottom area of ​​the cab before the front wheels of the vehicle; the windshield lip 12 is arranged on the windshield 10 and protrudes from the windshield surface 100, and the windshield lip 12 includes a first side and a second side, the first side of the windshield lip 12 is connected to the windshield surface 100, and the second side extends toward the bottom plate 11.

[0046] In a specific application scenario, the above-mentioned front bottom guard plate is applied to commercial vehicles such as heavy-duty tractors, the windshield surface 100 of the windshield 10 slides with the front bumper 20 of the vehicle, and the bottom plate 11 covers the bottom area of ​​the cab before the front wheels of the vehicle; when the vehicle is stationary or driving at a low speed, the windshield surface 100 of the windshield 10 is retracted into the front bumper 20, so that the windshield surface 100 does not affect the static appearance of the vehicle, and when the vehicle is driving at a low speed, it is generally on an uneven road surface, and the windshield surface 100 retracted into the front bumper 20 will not affect the approach angle of the cab, thereby ensuring the vehicle's passability on uneven roads, and the windshield lip 12 protruding from the windshield surface 100 can block the airflow from flowing downward into the bottom of the vehicle to a certain extent, thereby playing a certain drag reduction role.

[0047] When the vehicle is traveling at high speed, the windshield surface 100 extends out of the bottom of the front bumper 20, and the ground clearance of the front end of the cab is reduced. The windshield surface 100 can block the airflow and reduce the airflow flowing into the bottom of the vehicle. In addition, since the windshield lip 12 protrudes from the windshield surface 100, when the vehicle is traveling at high speed, the windshield lip 12 effectively prevents the airflow from moving downward and being drawn into the bottom of the vehicle. Most of the airflow is guided out along the groove structure formed by the bottom of the front bumper 20, the windshield surface 100 and the windshield lip 12. For details, please refer to Figures 4 to 7 As shown in the flow field diagram of the bottom of the cab, it can be seen from the figure that when the windshield 100 extends out of the bottom of the front bumper 20, the airflow flowing into the bottom of the vehicle is significantly reduced. Compared with the related art, the air resistance of the vehicle at high speed can be significantly reduced, and the front bottom guard plate has a simple structure and low cost.

[0048] It should be noted here that the specific structure of the vehicle and the front bumper 20 of the vehicle can refer to the prior art and will not be described in detail in the embodiment of the present invention.

[0049] In a specific embodiment of the present invention, referring to Figure 3 The windshield 10 also includes side surfaces 101 located on opposite sides of the windshield surface 100. One end of the side surface 101 is connected to the windshield surface 100, and the other end thereof extends in a direction away from the windshield surface 100. After the windshield 10 is installed on the vehicle, the two side surfaces 101 of the windshield 10 are arranged on both sides of the vehicle. When the vehicle is traveling at high speed, the windshield surface 100 can block the airflow, and the blocked airflow is guided to both sides of the vehicle along the side surfaces 101 of the windshield 10. Specifically, the connection between the windshield surface 100 and the side surfaces 101 of the windshield 10 is set as an arc transition, so that the airflow can be guided to both sides of the cab more smoothly.

[0050] In a specific embodiment of the present invention, the portion from the first side of the windshield lip 12 to the end thereof away from the windshield surface 100 is set as a curved surface, so as to guide the airflow more smoothly into the groove structure formed by the bottom of the front bumper 20, the windshield surface 100 and the windshield lip 12, and the windshield lip 12 extends from the windshield surface 100 of the windshield plate 10 to the side 101, so that the above-mentioned groove structure extends from the front end of the cab to both sides of the cab. When the vehicle is driving at high speed, the airflow flows from the front end of the cab along the above-mentioned groove structure and is guided to both sides of the cab, which is more conducive to the guidance of the airflow.

[0051] The specific materials and forming methods of the windshield 10 and the windshield lip 12 are optional. For example, the windshield 10 can be an integrally formed component or formed by splicing multiple panels; the windshield lip 12 can be fixedly connected to the windshield 10 or integrally formed with the windshield 10. The specific design can be flexibly made according to actual needs, and no specific restrictions are made in the embodiments of the present invention. In addition, the distance that the windshield lip 12 protrudes from the windshield surface 100 can be designed according to actual needs. Specifically, the distance that the windshield lip 12 protrudes from the windshield surface 100 is not less than 50 mm, which can effectively prevent the airflow from flowing to the bottom of the vehicle.

[0052] It should be pointed out here that when the front bottom guard plate of the above structure is actually applied to a vehicle, the end of the bottom plate 11 away from the windshield 100 needs to be hinged to the vehicle, and the front bottom guard plate swings with the hinge point as the center of the circle, so that the windshield 100 can slide relative to the front bumper 20, but when the windshield 100 swings around the hinge point, its motion trajectory is not a straight line. In order to avoid interference between the windshield 100 and the front bumper 20 during the movement, the shapes of the windshield 100 and the front bumper 20 can be flexibly designed so that the matching shapes of the two are consistent with the motion trajectory of the windshield 100, thereby avoiding the problem of motion interference. In addition, the windshield 100 of the windshield 10 can also be set to an elastic material, such as rubber, etc., and the windshield 100 will undergo elastic deformation when sliding relative to the front bumper 20, so as to avoid the problem of motion interference. However, it should be noted that the elastic material should also have a certain tensile strength to avoid the problem of deformation of the elastic material caused by high-speed airflow when the vehicle moves at high speed. Of course, other solutions can also be used to solve the problem of movement interference between the front bottom guard plate and the front bumper 20, which will not be listed one by one in the embodiments of the present invention.

[0053] It should also be pointed out that the above-mentioned front bottom guard plate is installed at the rear of the vehicle, and the bottom plate 11 is used to cover the bottom area of ​​the cab before the front wheels of the vehicle. In order to meet the vehicle approach angle requirements and ensure the vehicle's passability on uneven roads, when the windshield 100 is retracted into the front bumper 20, there is an angle between the bottom plate 11 and the horizontal plane. The specific angle can be designed according to actual working conditions. In the embodiment of the present invention, when the windshield 100 is retracted into the front bumper 20, the angle between the bottom plate 11 and the horizontal plane is 15 degrees. When the windshield 10 is extended from the bottom of the front bumper 20, the angle between the bottom plate 11 and the horizontal plane is 0 degrees.

[0054] In a specific embodiment of the present invention, referring to Figures 1 to 3The front bottom guard plate also includes an air guide hole 13 disposed between the bottom plate 11 and the windshield surface 100. After the front bottom guard plate is installed on the vehicle, the bottom plate 11 is arranged below the vehicle cooling module and covers the entire bottom area of ​​the cab before the front wheels. The air guide hole 13 can guide the excess airflow entering the cooling module from the grille to the bottom of the vehicle to reduce the internal flow resistance.

[0055] Specifically, one end of the air guide hole 13 along the length direction is close to one of the side surfaces 101 of the wind shield 10, and the other end is close to the other side surface 101 of the wind shield 10; the extension direction of the air guide hole 13 is parallel to the length direction of the wind shield surface 100, and the specific opening width of the air guide hole 13 can be selected according to actual needs. In this embodiment, the opening width of the air guide hole 13 is 40 mm.

[0056] In a specific embodiment of the present invention, a plurality of guide grooves 14 are arranged at intervals on the bottom surface of the base plate 11, and one end of the guide groove 14 is close to the wind shield surface 100. Specifically, the extension direction of the guide groove 14 is perpendicular to the length direction of the air guide hole 13. After the air guide hole 13 guides the excess airflow into the bottom of the vehicle, it is guided backwards through the guide groove 14, thereby reducing lateral turbulence.

[0057] In a specific embodiment of the present invention, a plurality of guide plates 15 are arranged at intervals on the bottom surface of the bottom plate 11, and the guide plates 15 protrude from the bottom surface of the bottom plate 11. Specifically, the guide plates 15 are integrally formed on the bottom surface of the bottom plate 11, and the guide grooves 14 are formed between adjacent guide plates 15. The specific parameters such as the number and width of the guide plates 15 and the guide grooves 14 can be designed according to actual needs. In this embodiment, the number of the guide grooves 14 is not less than 8, the spacing between adjacent guide grooves 14 is not greater than 100 mm, and the height of the guide plates 15 is 15 mm.

[0058] The vehicle provided by the present invention is described below, and the vehicle described below and the front end bottom guard plate described above can correspond to each other.

[0059] A vehicle comprises a front bottom guard plate provided by any of the above embodiments; the windshield surface 100 of the windshield 10 is slidably matched with the front bumper 20 of the vehicle, and the bottom plate 11 covers the bottom area before the front wheels of the vehicle.

[0060] Specifically, one end of the bottom plate 11 away from the windshield 100 is hinged to the vehicle, and the front bottom guard plate swings around the hinge point, so that the windshield 100 can slide relative to the front bumper 20 to extend out of the bottom of the front bumper 20 or retract into the front bumper 20.

[0061] In actual work, the windshield 100 will generally be retracted into the front bumper 20 when the vehicle is stationary or driving at a low speed. When the vehicle is driving at a low speed, it is generally on an uneven road surface. In order to meet the vehicle approach angle requirements and ensure the vehicle's passability on uneven roads, when the windshield 100 is retracted into the front bumper 20, the bottom plate 11 is set at an angle with the horizontal plane. Specifically, the angle between the bottom plate 11 and the horizontal plane is 15 degrees. When the vehicle is driving at high speed, the windshield 100 will extend out of the bottom of the front bumper 20. When the vehicle is driving at high speed, it is generally on a flat road surface such as a highway. In order to ensure the windshield effect and prevent the airflow from being drawn into the bottom of the vehicle, when the windshield 10 is extended from the bottom of the front bumper 20, the bottom plate 11 is parallel to the horizontal plane.

[0062] For the convenience of control, the above-mentioned vehicle further includes a speed sensor, a controller and a driving member 21; the driving member 21 is connected to the front bottom guard plate in a transmission manner and is used to drive the front bottom guard plate to move; the speed sensor is used to detect the current travel speed of the vehicle; the controller is connected to the driving member 21 and the speed sensor in a communication manner, and when it is determined that the current travel speed of the vehicle does not exceed the set value, the driving member 21 is controlled to drive the front bottom guard plate to move so that the windshield 100 is retracted into the front bumper 20; when it is determined that the current travel speed of the vehicle exceeds the set value, the driving member 21 is controlled to drive the front bottom guard plate to move so that the windshield 100 extends out of the bottom of the front bumper 20. The setting value of the above-mentioned vehicle speed can be selected according to the actual working conditions. In this embodiment, the setting value of the above-mentioned vehicle speed is 60 kilometers per hour.

[0063] Specifically, the driving member 21 can be a linear driving element such as an electric push rod, a pneumatic cylinder, or an oil cylinder. The output end of the linear driving element is connected to the base plate 11 to drive the base plate 11 to move around the hinge point.

[0064] By adopting the above technical solution, the front bottom guard plate can play a role in blocking the airflow. After the windshield surface 100 extends out of the bottom of the front bumper 20 under high-speed conditions, the airflow blocking effect is significantly enhanced, and the drag coefficient Cd can be reduced by 15 counts. For details, please refer to Figures 4 to 7 In the above flow field diagram, the yellow area represents the high-speed airflow, that is, the airflow entering the bottom of the cab when the vehicle is driving at high speed. The larger the area of ​​the yellow area, the more airflow entering the bottom of the cab, and vice versa. Figure 4 and Figure 6 It can be seen that after the windshield surface 100 extends out of the bottom of the front bumper 20, the area of ​​the yellow region is significantly reduced, that is, after the windshield surface 100 extends out of the bottom of the front bumper 20, the airflow blocking effect is significantly enhanced.

[0065] The novelty of the present invention is that when the vehicle is stationary or traveling at a low speed, the windshield surface 100 of the windshield 10 is retracted into the front bumper 20, so that the windshield surface 100 does not affect the static appearance of the vehicle. In addition, when the vehicle is traveling at a low speed, it is generally on an uneven road surface. The windshield surface 100 retracted into the front bumper 20 does not affect the approach angle of the cab, thereby ensuring the vehicle's passability on uneven roads. The windshield lip 12 protruding from the windshield surface 100 can to a certain extent block the airflow from flowing downwardly into the bottom of the vehicle, thereby playing a certain role in reducing drag. When the vehicle is traveling at a high speed, the windshield 10 is extended outward to prevent the vehicle from moving downwardly. At the bottom of the front bumper 20, the ground clearance of the front end of the cab is reduced, and the windshield 100 can block the airflow and reduce the airflow flowing into the bottom of the vehicle; in addition, since the windshield lip 12 protrudes from the windshield 100, when the vehicle is traveling at high speed, the windshield lip 12 effectively prevents the airflow from moving downward and being drawn under the vehicle. Most of the airflow is discharged along the groove structure formed by the bottom of the front bumper 20, the windshield 100 and the windshield lip 12. Compared with the related art, it can significantly reduce the air resistance of the vehicle when traveling at high speed, and the above-mentioned front bottom guard plate has a simple structure and low cost.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A front bottom guard plate, characterized in that: include: A windshield (10) comprises a windshield surface (100) for cooperating with a front bumper (20) of a vehicle, wherein the windshield surface (100) can be slidably matched with the front bumper (20) to extend out of the bottom of the front bumper (20) or retract into the front bumper (20); A bottom plate (11) is fixedly connected to the bottom of the windshield (10) and is arranged at an angle to the windshield surface (100), and is used to cover the bottom area of ​​the cab before the front wheels of the vehicle; a windshield lip (12) disposed on the windshield plate (10) and protruding from the windshield surface (100), the windshield lip (12) comprising a first side and a second side, the first side being connected to the windshield surface (100), and the second side extending toward the bottom plate (11); The windshield plate (10) further comprises side surfaces (101) located on opposite sides of the windshield surface (100); one end of the side surface (101) is connected to the windshield surface (100), and the other end extends in a direction away from the windshield surface (100); a curved surface transition is formed at the connection between the windshield surface (100) and the side surface (101); a portion from the first side of the windshield lip (12) to the end away from the windshield surface (100) is arranged as a curved surface; and the windshield lip (12) extends from the windshield surface (100) to the side surface (101).

2. The front bottom guard plate according to claim 1, characterized in that: It also includes an air guide hole (13) arranged between the bottom plate (11) and the wind shielding surface (100).

3. The front bottom guard plate according to claim 2, characterized in that: A plurality of guide grooves (14) are arranged at intervals on the bottom surface of the bottom plate (11); one end of the guide groove (14) is close to the air guide hole (13), and the other end thereof extends in a direction gradually away from the air guide hole (13).

4. The front bottom guard plate according to claim 3, characterized in that: A plurality of guide plates (15) are arranged at intervals on the bottom surface of the bottom plate (11); the guide plates (15) protrude from the bottom surface of the bottom plate (11); and guide grooves (14) are formed between adjacent guide plates (15).

5. A vehicle, characterized in that: It comprises a front bottom guard plate as described in any one of claims 1 to 4; the windshield surface (100) of the windshield (10) is slidably matched with the front bumper (20) of the vehicle, and the bottom plate (11) covers the bottom area of ​​the cab in front of the front wheels of the vehicle.

6. The vehicle according to claim 5, characterized in that When the windshield (100) is retracted into the front bumper (20), the bottom plate (11) is arranged at an angle to a horizontal plane; when the windshield (100) extends out of the bottom of the front bumper (20), the bottom plate (11) is parallel to the horizontal plane.

7. The vehicle according to claim 5, characterized in that Also includes: A driving member (21) is drivingly connected to the front bottom guard plate and is used to drive the front bottom guard plate to move; Speed ​​sensor, suitable for detecting the vehicle's travel speed; The controller is in communication connection with the driving member (21) and the speed sensor, and when it is determined that the current vehicle speed does not exceed a set value, controls the driving member (21) to drive the front bottom guard plate to move so that the windshield surface (100) is retracted into the front bumper (20); and when it is determined that the current vehicle speed exceeds a set value, controls the driving member (21) to drive the front bottom guard plate to move so that the windshield surface (100) extends out of the bottom of the front bumper (20).

Images