Vehicle bottom guard plate and vehicle

Abstract

A vehicle bottom guard plate and a vehicle belong to the field of vehicle parts, and the vehicle bottom guard plate comprises a bottom guard plate body used for being installed at the bottom of a rear suspension system, and the rear suspension system is provided with a part protruding relative to the bottom guard plate body in the height direction of the vehicle; and the drop-shaped bulge is arranged on the outer surface of the bottom protection plate body and is used for wrapping the part, which is bulged relative to the bottom protection plate body, of the rear suspension system in the height direction of the vehicle. The structure of the water-drop-shaped protrusions enables airflow at the bottom of a vehicle to be attached to the surfaces of the water-drop-shaped protrusions to flow when the airflow flows through the water-drop-shaped protrusions, airflow separation is avoided, the airflow attaching degree of the surface of the vehicle bottom protection plate and the positive pressure area of a rear suspension system are improved, meanwhile, tail vortexes generated when the vehicle runs at a high speed are improved, and the service life of the vehicle is prolonged. Therefore, wind resistance of the whole vehicle can be reduced, and endurance mileage of the vehicle is increased.

Description

Technical Field

[0001] The present application relates to the field of vehicle parts, and in particular to a vehicle underbody guard and a vehicle. Background Art

[0002] The range of electric vehicles has always been a focus of attention. Currently, in addition to increasing battery capacity to improve range, another important technical direction is optimizing vehicle styling and improving aerodynamics. Research shows that at high-speed cruising (≥70 km / h), wind resistance accounts for over 70% of driving resistance. When a pure electric car is traveling at a constant speed of 120 km / h, every 10% reduction in wind resistance increases its range by approximately 10 km. Therefore, reducing wind resistance is particularly important for improving the range of electric vehicles.

[0003] In order to make the bottom of the rear suspension system flat and reduce wind resistance, a bottom guard is installed at the bottom of the rear suspension system to prevent the rear suspension system from being exposed and increasing wind resistance. However, the rear suspension system of most models has a partially protruding part compared to the bottom guard, such as the part of the swing arm connected to the rear subframe. In response to this, the traditional solution is to design a flange or step on the bottom guard to prevent the bottom guard from interfering with the partially protruding part of the rear suspension system. For example, Figure 1 As shown in the structural diagram of the traditional rear suspension system bottom guard plate position, the left and right sides of the bottom guard plate 1 are provided with flanges 101, which are used to avoid the left and right swing arms 201 of the rear suspension system 2 respectively. Figure 2 As shown by the arrows in the diagram of the airflow principle of the underbody guard of a traditional rear suspension system, when the car is traveling at high speed, the airflow at the bottom of the car will flow along the surface of the underbody guard 1. When the airflow is suddenly blocked by the protruding flange 101, a positive pressure zone will be formed in this area, and the airflow will diffuse around the flange 101, resulting in serious separation, which is not conducive to reducing the wind resistance of the entire vehicle. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a vehicle underbody guard and a vehicle to solve the above technical problems.

[0005] The present application provides a vehicle underbody guard plate, comprising: an underbody guard plate body, for being installed at the bottom of a rear suspension system, the rear suspension system having a portion that protrudes in the vehicle height direction compared to the underbody guard plate body; and a teardrop-shaped protrusion, arranged on the outer surface of the underbody guard plate body, for covering the portion of the rear suspension system that protrudes in the vehicle height direction compared to the underbody guard plate body.

[0006] In some optional embodiments, the teardrop-shaped protrusion includes a first curved portion, a second curved portion, and a third curved portion connected in sequence from front to back, the first curved portion includes two first curved surfaces, the two first curved surfaces are respectively arched from the left and right sides to the middle and connected, the second curved portion includes two second curved surfaces, the two second curved surfaces are respectively arched from the left and right sides to the middle and connected, and the third curved portion includes two third curved surfaces, the two third curved surfaces are respectively arched from the left and right sides to the middle and connected.

[0007] In some optional embodiments, the curvature of the projection of the first curved surface on the bottom guard plate body is greater than the curvature of the projection of the second curved surface on the bottom guard plate body, and is smaller than the curvature of the projection of the third curved surface on the bottom guard plate body.

[0008] In some optional embodiments, the width of the first curved portion gradually increases from front to rear along the length direction of the vehicle, and the widths of the second curved portion and the third curved portion gradually decrease from front to rear along the length direction of the vehicle.

[0009] In some optional embodiments, the height of the first curved surface portion gradually increases from front to rear along the length direction of the vehicle, the height of the second curved surface portion gradually increases and then gradually decreases from front to rear along the length direction of the vehicle, and the height of the third curved surface portion gradually decreases from front to rear along the length direction of the vehicle.

[0010] In some optional embodiments, the ratio of the first curved surface portion, the second curved surface portion, and the third curved surface portion in the vehicle length direction is 1:2:1.

[0011] In some optional embodiments, the portions of the rear suspension system that protrude in the vehicle height direction compared to the bottom guard plate body are the portions of the left swing arm connected to the rear subframe and the portions of the right swing arm connected to the rear subframe, and there are two teardrop-shaped protrusions, which are respectively arranged at the left and right edges of the outer surface of the bottom guard plate body, and are respectively used to cover the portions of the left swing arm connected to the rear subframe and the portions of the right swing arm connected to the rear subframe.

[0012] In some optional embodiments, at least one connecting hole is respectively provided at the front edge, rear edge, left edge and right edge of the bottom guard plate body, and the connecting hole is a countersunk hole for connecting to the bracket on the rear subframe of the rear suspension system through fasteners.

[0013] In some optional embodiments, weight-reducing holes are provided on the bottom guard plate body.

[0014] The present application also provides a vehicle, comprising the vehicle underbody guard plate in any one of the above-mentioned embodiments.

[0015] Based on the above technical solution, the vehicle underbody guard plate and vehicle provided in the present application are provided with a teardrop-shaped protrusion on the outer surface of the underbody guard plate body. The teardrop-shaped protrusion is used to cover the portion of the rear suspension system that protrudes compared to the underbody guard plate body in the vehicle height direction. The configuration of the teardrop-shaped protrusion allows the airflow at the bottom of the vehicle to adhere to the surface flow of the teardrop-shaped protrusion when flowing through, thereby avoiding airflow separation. This improves the airflow fit of the surface of the vehicle underbody guard plate and the positive pressure area of ​​the rear suspension system, and also improves the tail vortex generated when the vehicle is driving at high speed, thereby reducing the wind resistance of the entire vehicle and improving the vehicle's cruising range. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is a schematic diagram of the structure at the bottom guard plate position of the traditional rear suspension system.

[0018] Figure 2 Schematic diagram of the airflow principle of the underbody guard of a traditional rear suspension system.

[0019] Figure 3 A schematic structural diagram of a vehicle underbody guard provided in an embodiment of the present application.

[0020] Figure 4 for Figure 3 Schematic cross-sectional view along line AA.

[0021] Figure 5 A schematic diagram of the outer surface of a vehicle underbody guard at a rear suspension system provided in an embodiment of the present application.

[0022] Figure 6 A schematic structural diagram of a vehicle underbody guard at a rear suspension system provided in an embodiment of the present application.

[0023] Figure 7 A schematic diagram of the airflow principle of a vehicle underbody guard provided in an embodiment of the present application.

[0024] Figure numerals: 1. bottom guard plate; 101. flange; 2. rear suspension system; 201. swing arm; 202. rear subframe; 100. vehicle bottom guard plate; 10. bottom guard plate body; 20. teardrop-shaped protrusion; 21. first curved portion; 211. first curved surface; 22. second curved portion; 221. second curved surface; 23. third curved portion; 231. third curved surface; 30. connecting hole; 40. weight-reducing hole. DETAILED DESCRIPTION

[0025] Specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It is apparent that the described embodiments are only some of the embodiments of the present application, and not all of them. All other embodiments derived by persons of ordinary skill in the art based on the description of this application without inventive effort are intended to fall within the scope of protection of this application.

[0026] In the description of this application, unless otherwise specified or limited, the terms "connect," "dispose," and "install" should be understood broadly. For example, "connect" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can mean that two components are internally connected. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0027] The terms "upper", "lower", "left", "right", "front", "back", "center", "top", "bottom", "inside", "outside", "vertical", "horizontal", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the product of the application is usually placed when used. They are only for the convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the present application.

[0028] The terms "first," "second," "third," etc. are merely used to distinguish elements of similar nature, and do not indicate or imply relative importance or a particular order, unless expressly specified and limited otherwise.

[0029] The terms "comprises," "includes," "has," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed or inherent to such process, method, article, or apparatus. In the absence of more limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0030] The term "plurality" means two or more (including two).

[0031] The term "and / or" is merely a description of the association relationship between associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0032] The terms "one embodiment," "as an example," "in one implementation," and the like mean that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example may be included in at least one embodiment or example of the present application. The schematic representations of such terms do not necessarily refer to the same embodiment, nor are they mutually exclusive independent or alternative embodiments. The embodiments and features within the embodiments of the present application may be combined in appropriate ways unless there is a conflict.

[0033] Figure 3 This is a structural diagram of a vehicle underbody guard plate 100 provided in an embodiment of the present application. Figure 4 for Figure 3 Schematic diagram of the cross section along line AA. Figure 3 and Figure 4 As shown, an embodiment of the present application provides a vehicle underbody panel 100. This underbody panel 100 is designed to be installed at the bottom of a rear suspension system, flattening the bottom of the rear suspension system to reduce wind resistance and preventing the rear suspension system from being exposed and increasing wind resistance. The underbody panel includes an underbody panel body 10, two teardrop-shaped protrusions 20, and a plurality of connection holes 30 disposed thereon.

[0034] The underbody guard plate body 10 is used to be installed at the bottom of a rear suspension system.

[0035] The teardrop-shaped protrusion 20 is used to cover the part of the rear suspension system that protrudes compared to the bottom guard plate body 10 in the vehicle height direction, that is, the part of the rear suspension system that is lower than the bottom guard plate body 10. Specifically, this part refers to the part of the swing arm connected to the rear subframe.

[0036] Two teardrop-shaped protrusions 20 are respectively arranged at the left edge and right edge of the outer surface of the bottom guard plate body 10 (the surface facing the ground and in contact with the external environment of the vehicle), and are used to cover the part of the left swing arm of the rear suspension system connected to the rear subframe and the part of the right swing arm connected to the rear subframe.

[0037] The teardrop-shaped protrusion 20 is shaped like a teardrop that is larger in front and smaller in the back. Specifically, the teardrop-shaped protrusion 20 includes a first curved portion 21, a second curved portion 22, and a third curved portion 23 that are sequentially connected from front to back, and there is a smooth transition between the first curved portion 21, the second curved portion 22, and the third curved portion 23.

[0038] The first curved portion 21 includes two first curved surfaces 211, which arch upward from the left and right sides and are connected to each other. The second curved portion 22 includes two second curved surfaces 221, which arch upward from the left and right sides and are connected to each other. The third curved portion 23 includes two third curved surfaces 231, which arch upward from the left and right sides and are connected to each other.

[0039] Among them, the curvature of the projection of the first curved surface 211 on the bottom guard plate body 10 is greater than the curvature of the projection of the second curved surface 221 on the bottom guard plate body 10, and is smaller than the curvature of the projection of the third curved surface 231 on the bottom guard plate body 10; the width of the first curved surface portion 21 gradually increases from front to rear along the length direction of the vehicle, and the widths of the second curved surface portion 22 and the third curved surface portion 23 gradually decrease from front to rear along the length direction of the vehicle; the height of the first curved surface portion 21 gradually increases from front to rear along the length direction of the vehicle, the height of the second curved surface portion 22 first gradually increases and then gradually decreases from front to rear along the length direction of the vehicle, and the height of the third curved surface portion 23 gradually decreases from front to rear along the length direction of the vehicle.

[0040] The ratio of the first curved surface portion 21, the second curved surface portion 22, and the third curved surface portion 23 in the vehicle length direction is designed according to the size of the structure to be covered. For example, the ratio of the first curved surface portion 21, the second curved surface portion 22, and the third curved surface portion 23 in the vehicle length direction is 1:2:1.

[0041] The size of the teardrop-shaped protrusion 20 is designed according to the size of the structure to be covered. For example, the length L of the teardrop-shaped protrusion 20 is 400 mm, the width W is 185 mm, and the height H is 25 mm.

[0042] The connection holes 30 are used to connect to the brackets on the rear subframe via fasteners, thereby enabling the installation of the vehicle underbody guard 100 at the rear suspension system. Specifically, at least one connection hole 30 is provided at the front edge, rear edge, left edge, and right edge of the underbody guard body 10. For example, three connection holes 30 are provided along the edge of the front edge of the underbody guard body 10 for connecting to the brackets on the front crossbeam of the rear subframe, two connection holes 30 are provided along the edge of the rear edge for connecting to the brackets on the rear crossbeam of the rear subframe, one connection hole 30 is provided at the left edge for connecting to the brackets on the left longitudinal beam of the rear subframe, and one connection hole 30 is provided at the right edge for connecting to the brackets on the right longitudinal beam of the rear subframe. The multiple connection holes 30 are all countersunk holes, which are used to allow the fasteners to be located within the connection holes 30 during installation, without protruding from the surface of the underbody guard body 10, thereby separating the airflow passing through.

[0043] To reduce cost and weight, the bottom guard plate body 10 is further provided with weight-reducing holes 40. For example, there are two weight-reducing holes 40, which are respectively provided at the left and right edges of the bottom guard plate body 10 and located between the teardrop-shaped protrusions 20 and the connecting holes 30 at the corresponding edges.

[0044] An embodiment of the present application further provides a vehicle, which includes the above-mentioned vehicle underbody guard plate 100.

[0045] Figure 5 This is a schematic diagram of the outer surface of a vehicle underbody guard 100 at the rear suspension system 2 provided in an embodiment of the present application. Figure 6 This is a structural diagram of a vehicle underbody guard 100 provided in an embodiment of the present application at a rear suspension system 2. Figure 7 The following is a schematic diagram of the airflow principle of a vehicle bottom guard plate 100 provided in an embodiment of the present application. Figures 5 to 7 As shown, the vehicle underbody guard 100 is connected to the bracket on the rear subframe 202 via fasteners passing through the connection holes 30, and is installed at the bottom of the rear suspension system 2. Two teardrop-shaped protrusions 20 respectively cover the portions of the left and right swing arms 201 of the rear suspension system 2 that are connected to the rear subframe 202.

[0046] When the vehicle is traveling at high speed, the airflow under the vehicle flows from front to back along the underbody 10. When the airflow reaches the teardrop-shaped protrusion 20, the unique shape of the teardrop-shaped protrusion 20 guides the airflow to continue flowing backward along the surface of the teardrop-shaped protrusion 20. In particular, the configuration of the rear portion of the teardrop-shaped protrusion 20 gradually tapers. As the airflow passes through, it can continue to flow backward along the rear portion of the teardrop-shaped protrusion 20, avoiding separation. This ensures a smooth transition of airflow between various areas under the vehicle and improves the tail vortex generated when the vehicle is traveling at high speed, thereby reducing the overall wind resistance of the vehicle.

[0047] In summary, the vehicle underbody guard and vehicle provided in the embodiments of the present application are configured such that a teardrop-shaped protrusion is arranged on the outer surface of the underbody guard body, and the teardrop-shaped protrusion is used to cover the portion of the rear suspension system that protrudes compared to the underbody guard body in the vehicle height direction. The configuration of the teardrop-shaped protrusion allows the airflow at the bottom of the vehicle to flow along the surface of the teardrop-shaped protrusion when flowing through, thereby avoiding airflow separation, improving the airflow fit of the surface of the vehicle underbody guard and the positive pressure area of ​​the rear suspension system, and also improving the tail vortex generated when the vehicle is traveling at high speed, thereby reducing the wind resistance of the entire vehicle and improving the vehicle's cruising range.

[0048] The above is only a specific implementation method of the present application, but the scope of protection of the present application is not limited thereto. Any technician familiar with the field can easily think of various changes or replacements within the technical scope disclosed in the present application, which should all be included in the scope of protection of the present application.

Claims

1. A vehicle underbody guard plate, characterized in that: include: An underbody body, adapted to be mounted on a bottom portion of a rear suspension system, wherein the rear suspension system has a portion protruding relative to the underbody body in a vehicle height direction; as well as A teardrop-shaped protrusion is provided on the outer surface of the bottom guard plate body and is used to cover a portion of the rear suspension system that protrudes from the bottom guard plate body in the vehicle height direction.

2. The vehicle underbody guard according to claim 1, characterized in that: The teardrop-shaped protrusion includes a first curved portion, a second curved portion, and a third curved portion that are sequentially connected from front to back. The first curved surface portion includes two first curved surfaces, which are arched from the left and right sides toward the middle and connected to each other. The second curved surface portion includes two second curved surfaces, which are arched from the left and right sides toward the middle and connected to each other. The third curved surface portion includes two third curved surfaces, which are respectively arched from the left and right sides toward the middle and are connected to each other.

3. The vehicle underbody guard according to claim 2, characterized in that: The curvature of the projection of the first curved surface on the bottom guard plate body is greater than the curvature of the projection of the second curved surface on the bottom guard plate body, and is smaller than the curvature of the projection of the third curved surface on the bottom guard plate body.

4. The vehicle underbody guard according to claim 2, characterized in that: The width of the first curved portion gradually increases from front to rear along the length direction of the vehicle, and the widths of the second curved portion and the third curved portion gradually decrease from front to rear along the length direction of the vehicle.

5. The vehicle underbody guard according to claim 2, characterized in that: The height of the first curved surface portion gradually increases from front to rear along the length direction of the vehicle, the height of the second curved surface portion gradually increases and then gradually decreases from front to rear along the length direction of the vehicle, and the height of the third curved surface portion gradually decreases from front to rear along the length direction of the vehicle.

6. The vehicle underbody guard according to claim 2, characterized in that: The ratio of the first curved surface portion, the second curved surface portion, and the third curved surface portion in the vehicle length direction is 1:2:

1.

7. The vehicle underbody guard according to claim 1, characterized in that: The portions of the rear suspension system that protrude in the vehicle height direction relative to the underbody are the portions of the left swing arm and the right swing arm connected to the rear subframe. There are two teardrop-shaped protrusions, which are respectively arranged at the left edge and the right edge of the outer surface of the bottom guard plate body, and are respectively used to cover the part of the left swing arm connected to the rear subframe and the part of the right swing arm connected to the rear subframe.

8. The vehicle underbody guard according to claim 1, wherein: At least one connecting hole is respectively provided at the front edge, rear edge, left edge and right edge of the bottom guard plate body. The connecting hole is a countersunk hole used to connect the bottom guard plate body with the bracket on the rear subframe of the rear suspension system through fasteners.

9. The vehicle underbody guard according to claim 1, wherein: The bottom guard plate body is provided with weight-reducing holes.

10. A vehicle, characterized in that: The vehicle bottom guard plate comprises the vehicle bottom guard plate according to any one of claims 1 to 9.

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